n. 凤梨, 菠萝, 失业救济金

[医] 凤梨, 波萝

Pineapple \Pine"ap`ple\, n. (Bot.)
A tropical plant ({Ananassa sativa}); also, its fruit; -- so
called from the resemblance of the latter, in shape and
external appearance, to the cone of the pine tree. Its origin
is unknown, though conjectured to be American.

fragmentation grenade \fragmentation grenade\ n. (Mil.)
A type of hand grenade designed to burst into multiple
fragments upon detonation of the explosive charge; the
fragments fly away at high velocity, killing or wounding
persons nearby. Contrasted to {concussion grenade}. The
common type of fragmentation grenade used by the American
military was sometimes jocosely referred to as a {pineapple}
from its reticulated surface appearance, resembling that of
the fruit.
[PJC]