| sacs | <ethnology> A tribe of Indians, which, together with the Foxes, formerly occupied the region about Green Bay, Wisconsin. Alternative forms: Sauks. Source: Websters Dictionary (01 Mar 1998) |
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| anal sacs | Two sacs opening on either side of the anus near the junction of the mucous membrane and skin in carnivores. The glandular lining produces a gray or brown sebaceous secretion having an unpleasant odour. The sac ducts sometimes become occluded and the secretion accumulates. This leads to irritation that the animal attempts to relieve by rubbing its anus along the ground. The sacs may subsequently become infected and abscessed. (12 Dec 1998) |
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| nasal sacs | The deepened nasal pits that develop into the definitive nasal cavities. (05 Mar 2000) |
| lymph sacs | The earliest lymphatic vessels formed in the embryo. (05 Mar 2000) |