Definition of "beaker" [beak•er]

• A wide cylindrical glass vessel with a pouring lip, used as a laboratory container and mixing jar. (noun)
• A large drinking cup with a wide mouth. (noun)
• The quantity that a beaker holds. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "What's going on in the beaker is actually quite a complex set of chemical reactions."
• "However, the rate of increase may finally be beginning to ease, as the beaker is almost full."
• "A tempered glass or stainless steel beaker is preheated with boiling water, coarse-ground coffee is added, then hot water."