- the dilated upper portion of the nasolacrimal duct that receives tears from the lacrimal ducts.
Origin of lacrimal sac
First recorded in 1770–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- The upper portion of the nasolacrimal duct into which the two lacrimal ducts empty.dacryocyst tear sac
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.