Source : Webster's Revised Unabridged Dictionary (1913)

Locule \Loc"ule\, n. [Cf. F. locule. See {Loculus}.] (Zo["o]l.)
   A little hollow; a loculus.

Source : WordNet®

locule
     n : a small cavity or space within an organ or in a plant or
         animal [syn: {loculus}]