The Collaborative International Dictionary of English v.0.48:
Bellow \Bel"low\, v. i. [imp. & p. p. Bellowed; p. pr. & vb.
n. Bellowing.] [OE. belwen, belowen, AS. bylgean, fr.
bellan; akin to G. bellen, and perh. to L. flere to weep,
OSlav. bleja to bleat, Lith. balsas voice. Cf. Bell, n. &
v., Bawl, Bull.]
1. To make a hollow, loud noise, as an enraged bull.
2. To bowl; to vociferate; to clamor. --Dryden.
3. To roar; as the sea in a tempest, or as the wind when
violent; to make a loud, hollow, continued sound.
The bellowing voice of boiling seas. --Dryden.