Con*strict"or (?), n.
1.
That which constricts, draws together, or contracts.
2. Anat.
A muscle which contracts or closes an orifice, or which compresses an organ; a sphincter.
3. Zool.
A serpent that kills its prey by inclosing and crushing it with its folds; as, the boa constrictor.
© Webster 1913.