trachealis

tra·che·a·lis (mus·cle)

[TA] the band of mostly transversely disposed smooth muscular fibers in the fibrous membrane connecting the ends of the tracheal rings posteriorly; action, reduces caliber of trachea. Synonym(s): musculus trachealis [TA]

trachealis

(trā″kē-ā′lĭs) [L.] A muscle composed of smooth muscle fibers that extends between the ends of the tracheal rings. Its contraction reduces the size of the lumen.