Source : Webster's Revised Unabridged Dictionary (1913)

Squama \Squa"ma\, n.; pl. {Squam[ae]}. [L. a scale.] (Med.)
   A scale cast off from the skin; a thin dry shred consisting
   of epithelium.

Source : WordNet®

squama
     n : a protective structure resembling a scale
     [also: {squamae} (pl)]