Samara

from WordNet (r) 3.0 (2006)

samara
    n 1: a winged often one-seed indehiscent fruit as of the ash or
         elm or maple [syn: {samara}, {key fruit}, {key}]

from The Collaborative International Dictionary of English v.0.48

Samara \Sa*ma"ra\ (? or ?), n. [L. samara, samera, the seed of
   the elm.] (Bot.)
   A dry, indehiscent, usually one-seeded, winged fruit, as that
   of the ash, maple, and elm; a key or key fruit.
   [1913 Webster]