anal sac

noun

Definition of anal sac

  1. :  one of the usually paired small pouches of glandular tissue that are located on either side of the anus between the internal and external anal sphincters of various animals (such as dogs, cats, skunks, and foxes) and that discharge often strong-smelling secretions into the anus :  anal gland I don't think anyone truly knows why dogs have anal sacs, but the most prominent theory is that they are used as a marking scent. — Jim Berg, News Journal (Wilmington, Delaware), 24 June 2008

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!

1826

First Known Use of anal sac

1826


Seen and Heard

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

WORD OF THE DAY

to criticize severely

Get Word of the Day daily email!