The Collaborative International Dictionary
Rhamphothecae
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.
Wiktionary
rhamphothecae
n. (plural of rhamphotheca English)