词根词缀：rostr-, rostro-, rostri-

【来源及含义】Latin: beak

【同源单词】angustirostral, birostrate, brevirostral, brevirostrate, conirostres, cultrirostral

词根词缀：-trum

【来源及含义】Latin: a suffix; result of, the act of, means of

【同源单词】antrum, auscultoplectrum, electrum, lustrum, monstrum, plectrum