The Collaborative International Dictionary of English v.0.48:
Proboscidian \Pro`bos*cid"i*an\, a. (Zool.) Pertaining to the Proboscidea. -- n. One of the Proboscidea. [1913 Webster]WordNet (r) 3.0 (2006):
proboscidian n 1: massive herbivorous mammals having tusks and a long trunk [syn: proboscidean, proboscidian]