adelphis

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

ădelphĭs, ĭdis, f. [ἀδελφή, sister; so called as resembling the caryotis, or because they hung two together from a branch],

a kind of date , Plin. 13, 4, 9, § 45.