mysis

noun

my·​sis

ˈmīsə̇s

1

capitalized : the type genus of the family Mysidae

2

or mysis stage plural -es : a larva of higher crustaceans (as macrurans and peneids) having all the thoracic appendages biramous

Word History

Etymology

New Latin, from Greek mysis action of closing (used of the lips or eyes), from myein to close (used of the lips or eyes), close the eyes + -sis

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!