1. sphincter - Noun
2. sphincter - Adjective
A muscle which surrounds, and by its contraction tends to close, a natural opening; as, the sphincter of the bladder.
Of, pertaining to, or designating, a sphincter; as, a sphincter muscle.
Source: Webster's dictionaryA physician measures the latency between squeeze and contraction by observing the anal sphincter or by feeling it with a gloved finger inserted past the anus. Source: Internet
Causes Fetal distress during labor causes intestinal contractions, as well as relaxation of the anal sphincter, which allows meconium to pass into the amniotic fluid and contaminate the amniotic fluid. Source: Internet
Found between the terminal rectum and coprodeum is a strong sphincter. Source: Internet
As a result, the organ always curves somewhat to the left before curving back to meet the pyloric sphincter. Source: Internet
A unique sphincter -like muscle around the ear canal constricts the passageway, thereby dampening acoustic signals and allowing the animal to hear more seismic signals. citation Elephants appear to use seismics for a number of purposes. Source: Internet
Pressure from the frog’s sphincter keeps its anus closed, prompting the insect to stimulate the frog’s intestine. Source: Internet