资料来源 : pyDict

颌角鞘

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

Dertrotheca \Der`tro*the"ca\, n. [NL., fr. Gr. ? beak + ? box,
   case.] (Zo["o]l.)
   The horny covering of the end of the bill of birds.