Source : Webster's Revised Unabridged Dictionary (1913)

Lunula \Lu"nu*la\, n.; pl. {Lunul[ae]}. [L., prop., a little
   moon. See {Lunule}.] (Anat. & Zo["o]l.)
   Same as {Lunule}.

Source : WordNet®

lunula
     n 1: the crescent-shaped area at the base of the human fingernail
          [syn: {half-moon}, {lunule}]
     2: a crescent-shaped metal ornament of the Bronze Age
     [also: {lunulae} (pl)]