資料來源 : pyDict

頜角鞘

資料來源 : 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.