Source : Webster's Revised Unabridged Dictionary (1913)

Beaker \Beak"er\, n. [OE. biker; akin to Icel. bikarr, Sw.
   b["a]gare, Dan. baeger, G. becher, It. bicchiere; -- all fr.
   LL. bicarium, prob. fr. Gr. ? wine jar, or perh. L. bacar
   wine vessel. Cf. {Pitcher} a jug.]
   1. A large drinking cup, with a wide mouth, supported on a
      foot or standard.

   2. An open-mouthed, thin glass vessel, having a projecting
      lip for pouring; -- used for holding solutions requiring
      heat. --Knight.

Source : WordNet®

beaker
     n 1: a flatbottomed jar made of glass or plastic; used for
          chemistry
     2: a cup (usually without a handle)