alicorn
noun
al·i·corn ˈa-lə-ˌkȯrn 
plural alicorns
: the horn of a unicorn
Many alicorns circulated during this period, often passing as prestige gifts from one royal house to another.
Chris Lavers, The Natural History of Unicorns, 2009
Chris Lavers, The Natural History of Unicorns, 2009
Word History
Etymology
borrowed from Italian alicorno, alicorne "unicorn," probably from a dissimilated variant of unicorno, borrowed from Late Latin ūnicornis unicorn
First Known Use
1966, in the meaning defined above