What does «constrictor» mean in Spanish?

Constricting: squeezing and closing, as if compressing; limiting, oppressing, or restricting with force.

Examples of use in Spanish: "músculos constrictores de la faringe".

"del periné arrancan unas fibras musculares que envuelven a la vagina y que constituyen el músculo constrictor de esta".

"El nervio motor ocular común, inerva el elevador del párpado superior y el constrictor de la pupila, todos los músculos extraoculares menos el recto externo y el oblicuo mayor", Anestesia Local en Oftalmología (2012) - Horacio Serrano.

"El gorgojo del banano, Cosmopolites sordidus Germar, ha sido reportado como un constrictor de importancia en la producción de banano".
The medicine used to constrict, that is, to close or limit the opening of ducts or orifices of the body. Also any substance that produces constriction.

Examples of use in Spanish: "medicamento constrictor".

"tiene un efecto constrictor vascular".

"el efecto de la nicotina sobre el tejido eréctil es constrictor (las arterias se cierran)".
(boa constrictor) The best known and strongest of the boa species. Native to the Americas, from Argentina to northern Mexico. Lives in trees as well as on land.