a diagram outlining the history of the behavior patterns (as of divorce, abortion, or suicide) of a family over several generations; also : a similar diagram detailing the medical history of a family in order to assess a family member’s risk of developing disease

Pronunciation:
JEN-oh-gram

In a sentence:
On the eve of his divorce being finalized, Richard looked over a genogram that his mother had prepared several decades ago, called her immediately, and sarcastically thanked her for warning him ahead of time.

In a different sentence:
When Sally got to the question about family illnesses on her new patient form, she attached a 300-page copy of a genogram which she’d whipped up the night before, and sat back in her waiting room chair, completely satisfied and incredibly proud.