A small scar or scar-like mark, particularly the germinal spot or disc on an egg yolk.
From Latin 'cicatrix' (scar) + diminutive suffix '-cle'. Applied to the embryonic disc in eggs because of its scar-like appearance.
The cicatricle is actually where the chicken embryo begins—that tiny white dot you might see in an egg is the bird waiting to develop, marked by a scar-like spot.
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