different between lunule vs lucule

English

Borrowed from French lunule, from Latin l?nula, diminutive of l?na (“moon”).

lunule (plural lunules)

Anything crescent-shaped; a crescent-shaped part or mark; a lunula or lune.
A special area in front of the beak of many bivalve shells, sometimes shaped like a double crescent, but more often heart-shaped.

lunule f

Diminutive from Latin lux, lucis (“light”).

lucule (plural lucules)

(astronomy) A spot or fleck on the sun that is brighter than the surrounding surface.

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