Webster's Revised Unabridged Dictionary · 1913

Bumblebee

Bumblebee ({not transcribed}) , noun

[Old English bumblen to make a humming noise (dim. of bum, v. i.) + bee. Compare Humblebee.]

(Zoology) A large bee of the genus Bombus, sometimes called humblebee; -- so named from its sound.

There are many species. All gather honey, and store it in the empty cocoons after the young have come out.