The Collaborative International Dictionary of English v.0.48:
Phytelephas \Phy*tel"e*phas\ (f[imac]*t[e^]l"[-e]*f[a^]s), n. [NL., fr. Gr. fyto`n a plant + ele`fos the elephant; also, ivory.] (Bot.) A genus of South American palm trees, the seeds of which furnish the substance called vegetable ivory. [1913 Webster]WordNet (r) 3.0 (2006):
phytelephas n 1: small genus of South American feather palms [syn: phytelephas, genus Phytelephas]