A rare medical condition where someone has little or no fibrinogen (a protein needed for blood clotting) in their blood.
From 'a-' (not) + 'fibrinogen' (the clotting protein) + '-emia' (blood condition), all combining Greek and Latin roots formed in the 20th century to describe this inherited blood disorder.
This medical term perfectly shows how doctors build scientific language like building blocks—by adding prefixes and suffixes to existing terms, they can name thousands of conditions without inventing completely new words.
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