10 Fascinating Facts About the Thesaurus for National Thesaurus Day

iStock.com/LeitnerR
iStock.com/LeitnerR

Writers often turn to a thesaurus to diversify their vocabulary and add nuance to their prose. But looking up synonyms and antonyms in a thesaurus can help anyone—writer or not—find the most vivid, incisive words to communicate thoughts and ideas. Since January 18 is Thesaurus Day, we’re celebrating with these 10 fascinating facts about your thesaurus.

1. Its name comes from the Greek word for treasure.

Greek lettering.
iStock

Most logophiles consider the thesaurus to be a treasure trove of diction, but the word thesaurus really does mean "treasure." It derives from the Greek word thésauros, which means a storehouse of precious items, or a treasure.

2. You can call them thesauruses or thesauri.

Row of old books lined up.
iStock

How do you refer to more than one octopus? People say everything from octopuses to octopi to octopodes. Similarly, many people have trouble figuring out the correct plural form of the word thesaurus. Though thesauri is technically correct—it attaches a Latin suffix to the Latin word thēsaurus—both thesauri and thesauruses are commonly used and accepted today.

3. Early thesauruses were really dictionaries.

Close-up of the term 'ideal' in a thesaurus.
iStock

Ask a French scholar in the 16th century to see his thesaurus, and he'd gladly give you a copy of his dictionary. In the early 1530s, a French printer named Robert Estienne published Thesaurus Linguae Latinae, a comprehensive Latin dictionary listing words that appeared in Latin texts throughout an enormous span of history. And in 1572, Estienne's son Henri published Thesaurus Linguae Graecae, a dictionary of Greek words. Although the Estiennes's books were called thesauruses, they were really dictionaries comprised of alphabetical listings of words with their definitions.

4. A Greek historian wrote the first book of synonyms.

Stacks of books surrounding an open book and a pair of glasses.
iStock

Philo of Byblos, a Greek historian and grammarian, wrote On Synonyms, a dictionary of synonyms that scholars consider to be the first ancient thesaurus. Dating to the late 1st century or early 2nd century CE, the book lists Greek words that are similar in meaning to each another. Sadly, we don’t know much more about On Synonyms because copies of the work haven’t survived over the centuries.

5. An early Sanskrit thesaurus was written in the form of a poem.

Sanskrit lettering.
iStock

In the 4th century CE, an Indian poet and grammarian named Amara Sinha wrote The Amarakosha, a thesaurus of Sanskrit words. Rather than compile a boring list of similar words, Amara Sinha turned his thesaurus into a long poem. Divided into three sections—words relating to the divine, the earth, and everyday life—The Amarakosha contains verses so readers could memorize words easily. This thesaurus is the oldest book of its kind that still exists.

6. A British doctor wrote the first modern thesaurus.

Portrait of Peter Mark Roget.
Thomas Pettigrew, Wikimedia Commons // Public Domain

Peter Mark Roget is the British doctor credited with authoring the first modern thesaurus. In 1805, he began compiling a list of words, arranged by their meaning and grouped according to theme. After retiring from his work as a physician in 1852, Roget published his Thesaurus of English words and phrases; so classified and arranged as to facilitate the expression of ideas and assist in literary composition. Today, Roget’s Thesaurus is still commercially successful and widely used. In fact, we celebrate Thesaurus Day on January 18 because Roget was born on this day in 1779.

7. The thesaurus has a surprising link to a mathematical tool.

Image of a vintage log log slide rule.
Joe Haupt, Flickr // CC BY-SA 2.0

The division between "words people" and "numbers people" is deep-seated. Many mathematicians may try to steer clear of thesauruses, and bibliophiles may avoid calculators, but the thesaurus is actually linked to a mathematical tool. Around 1815, Roget invented the log-log slide rule, a ruler-like device that allows users to easily calculate the roots and exponents of numbers. So while the inventor of the thesaurus was compiling words for his tome, he was also hard at work on the log-log slide rule. A true jack-of-all-trades.

8. The Oxford English Dictionary has its own historical thesaurus.

Synonyms for
iStock

In 1965, a professor of English Language at Glasgow University suggested that scholars should create a historical thesaurus based on entries in the Oxford English Dictionary. The project was a massive undertaking, as people from multiple countries worked for 44 years to compile and classify words. Published in 2009, the Historical Thesaurus to the Oxford English Dictionary contains 800,000 words organized by theme and date. The thesaurus covers words and synonyms from Old English to the present day and lets readers discover when certain words were coined and how long they were commonly used.

9. One artist turned his love of words into a series of thesaurus paintings.

Mel Bochner,
Mel Bochner, "Crazy," 2004. Francesca Castelli, Flickr // CC BY-NC-ND 2.0

In 2014, the Jewish Museum in New York showed a survey of conceptual artist Mel Bochner’s art. Bochner had incorporated words and synonyms in his paintings for years—which were collectively referred to as the thesaurus paintings—featuring word paintings and lists of synonyms on canvas. The brightly colored paintings feature different groups of English and Yiddish synonyms. According to Bochner, Vietnam and Iraq war veterans cried after seeing his thesaurus painting Die, which features words and phrases such as expire, perish, succumb, drop dead, croak, go belly up, pull the plug, and kick the bucket.

10. There's an urban thesaurus for all your slang synonym needs

Copy of an Urban Dictionary book.
Effie Yang, Flickr // CC BY-NC-ND 2.0

Urban Dictionary helps people decipher the latest slang terms, but where should you go when you need a thesaurus of slang? Urban Thesaurus, of course. The site, which is not affiliated with Urban Dictionary, indexes millions of slang terms culled from slang dictionaries, then calculates usage correlations between the terms. Typing in the word money, for example, gives you an eclectic list of synonyms including scrilla, cheddar, mulah, coin, and bling.

This story originally ran in 2017.

What’s the Difference Between Crocheting and Knitting?

djedzura/iStock via Getty Images
djedzura/iStock via Getty Images

With blustery days officially upon us, the most pressing question about your sweaters, scarves, hats, and mittens is probably: “Are these keeping me warm?” If you’re a DIY enthusiast, or just a detail-oriented person in general, your next question might be: “Were these knitted or crocheted?”

Knitting and crocheting are both calming crafts that involve yarn, produce cozy garments and other items, and can even boost your mental well-being. Having said that, they do have a few specific differences.

To knit, you need needles. The size, material, and number of those needles depends on the project; though most traditional garments are made using two needles, it’s also possible to knit with just one needle, or as many as five. But regardless of the other variables, one or both ends of your knitting needles will always be pointed.

While crocheting calls for a similar long, thin tool that varies in size and material, it has a hooked end—and you only ever need one. According to The Spruce Crafts, even if you hear people refer to the tool as a crochet needle, they’re really talking about a crochet hook.

crotchet hook and garment
jessicacasetorres/iStock via Getty Images

Part of the reason you only use one hook brings us to the next difference between crocheting and knitting: When crocheting, there’s only one “active loop” on your hook at any given time, whereas knitting entails lining up loops down the length of your needles and passing them between needles. The blog Darn Good Yarn explains that since each loop is attached to a long row of stitches, accidentally “dropping” one off the end of your needle might unravel the entire row.

Of course, you have a better chance of avoiding that type of manual error if you’re using a knitting machine or loom, which both exist. Crocheting, on the other hand, has to be done by hand. Since machines can create garments with extremely small stitches, some knit clothes can be much more lightweight or close-fitting than anything you’d be able to crochet—and knitted clothes can also be mass-produced.

When it comes to what the items actually look like, crochet stitches characteristically look more like knots, while knit stitches seem flatter and less bulky. However, materials and techniques have come a long way over the years, and now there’s more crossover between what you’re able to knit and crochet. According to The Spruce Crafts, socks and T-shirts—traditionally both garments that would be knitted—can now technically be crocheted.

knitting needles and garment
Sedan504/iStock via Getty Images

And, believe it or not, knitting and crocheting can even be used to depict complicated mathematical concepts: see what a crocheted hyperbolic plane, Lorenz manifold, and more look like here.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

Idioms: One or Two?

SECTIONS

arrow
LIVE SMARTER