The Collaborative International Dictionary of English v.0.48:

Beccabunga \Bec`ca*bun"ga\, n. [NL. (cf. It. beccabunga, G.
   bachbunge), fr. G. bach brook + bunge, OHG. bungo, bulb. See
   Beck a brook.]
   See Brooklime.
   [1913 Webster]