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

Rhamphotheca \Rham`pho*the"ca\, n.; pl. {Rhamphothec[ae]}. [NL.,
   fr. Gr "ra`mnos a beak + ?? a case.] (Zo["o]l.)
   The horny covering of the bill of birds.