dilator

About 0.30 uses per million words.

Meaning

1. noun Any nerve or muscle that causes part of the body to dilate.
2. noun Any drug that causes such dilation.
3. noun An instrument used to dilate an orifice or cavity.

Similar words

hegar pupillo vaso dilatation iris dilator muscle constrictor speculum divulsor laxator compressor

Often followed by

is muscle muscles and of pupillae fibres fibers nerves