an'nulus

PI. annuli. A ring or ring-shaped structure, annuli cartilaginei, annuli cart i lag i nos i tracheae. The incomplete cartilaginous rings of the trachea, annuli of Bottcher. The first row of meshes in the membrana reticular is of the duct us cochlear is, pa ing outward from the junction of the inner and outer pillars. Corti's cells fill or rest upon these meshes. a. crural is extern us. The saphenous opening of the fascia lat a. a. oval is. The prominent upper and lateral borders of the fovea oval is of the right auricle of the heart, a. tendineus, a. ten dinos us. The tendinous ring of Afnold; the structure from which the fibers of the middle layer of the membrana tympani originate, a. trachea. A tracheal ring. a. tympani, a. tympanic us. The tympanic ring; an o eous ring which develops into the external canal, a. valvulosus. The annular membrane attached to the margin of the auriculoventricular opening and formed by the union of the bases of the right auriculoventricular valves. [Lat., annulus, a ring.]