nonretractile

• 形容词，表示不能被缩回、收回或向后拉回的，常用于生物学或技术语境。

An adjective meaning not capable of being drawn back or in, typically used in biological or technical contexts; now largely replaced by 'non-retractable'.

1. Not capable of being drawn backC2formal

   Describes a part of an animal or object that cannot be pulled back or withdrawn.

   不能缩回的

   • A cat's claws are retractile, but a dog's claws are nonretractile.
   • The nonretractile landing gear on older aircraft was simpler but less aerodynamic.
   • Some animals have nonretractile penises, which remain visible even when not in use.

   同义词fixedimmovablenonretractable

   反义词retractableretractile