an animal that is placed in a given environment and then monitored to find out if an infectious disease or other harmful agent is present in that environment
- Sentinel gland
sentinel gland sen·ti·nel gland (sěn’tə-nəl) n. A single, enlarged lymph node in the omentum that may indicate an ulcer opposite to it in the greater or lesser curvature of the stomach.
- Sentinel pile
sentinel pile n. A thickening of the mucous membrane at the lower end of a fissure of the anus.
- Sentinel tag
sentinel tag n. A piece of projecting edematous skin at the lower end of an anal fissure.
noun, plural sentries. 1. a soldier stationed at a place to stand guard and prevent the passage of unauthorized persons, watch for fires, etc., especially a sentinel stationed at a pass, gate, opening in a defense work, or the like. 2. a member of a guard or watch. noun (pl) -tries 1. a soldier who […]