资料来源 : pyDict

矽藻的细胞膜

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Frustule \Frus"tule\, n. [L. frustulum, dim. fr. frustum a
   piece: cf. F. frustule.] (Bot.)
   The siliceous shell of a diatom. It is composed of two
   valves, one overlapping the other, like a pill box and its
   cover.