A medical condition in which a person is born without fingers or toes, or has only vestigial ones.
From Greek 'a-' (without) + 'daktylos' (finger/toe) + medical suffix '-ia' (condition). Coined in medical terminology during the 19th century.
This rare genetic condition shows up in medical textbooks, but it's also been documented in evolutionary studies of some aquatic mammals that lost digits as they adapted to water over millions of years.
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