noun Bo·tryl·lus \-ləs\

Definition of Botryllus

  1. :  a genus (the type of the family Botryllidae) of colonial incrusting tunicates with zooids resembling rays arranged about a common excurrent atrium — see golden star

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.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of botryllus

New Latin, irregular from Greek botrys

Seen and Heard

What made you want to look up Botryllus? Please tell us where you read or heard it (including the quote, if possible).


a trip made at another's expense

Get Word of the Day daily email!