dilatator pupillae muscle

di·la·ta·tor pu·pil·lae mus·cle

(dī'lā-tā-tŏr pyū-pil'ē mŭs'ĕl) [TA]
The radial muscular fibers extending from the sphincter pupillae to the ciliary margin; some anatomists regard them as elastic, not muscular, in humans.
Synonym(s): musculus dilatator pupillae [TA] .