资料来源 : pyDict

柄孔盖

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

Deltidium \Del*tid"i*um\, n. [NL., fr. Gr. de`lta, the letter
   [Delta].] (Zo["o]l.)
   The triangular space under the beak of many brachiopod
   shells.