plural noun

: an order of small commonly luminescent malacostracan crustaceans (division Eucarida) related to the Decapoda, resembling shrimps, and in some areas forming an important element of marine plankton
adjective or noun
euphausiid adjective or noun

Word History


New Latin, from Euphausia, included genus (perhaps from eu- + Greek pha- —from phainein to show—+ ousia substance) + -acea

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Dictionary Entries Near Euphausiacea

Cite this Entry

“Euphausiacea.” Dictionary, Merriam-Webster, Accessed 31 Mar. 2023.

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