A medical condition where someone is unable to have children or is childless.
From Greek 'a-' (without) + 'teknon' (child), derived from Proto-Indo-European roots meaning 'to beget.' The term emerged in medical literature in the 19th century to describe infertility or the state of being without offspring.
This word reveals how medicine borrowed Greek word-building blocks to create precise terms for human conditions—the prefix 'a-' meaning 'without' appears in hundreds of medical terms, making Greek a secret language doctors use to describe what's missing from the body.
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