(chiefly in the plural, anatomy) inward folding of the choroid with the function of producing aqueous humour

(anatomy) A circle of arteries at the base of the brain that is formed by the cerebral and communicating arteries and is a site of aneurysms.

an incomplete electrical circuit through which no current can flow

(informal) Synonym of anticircumcision

(informal) Supportive of male infant circumcision.

(anatomy) A ring of fibrous strands connecting the ciliary body with the crystalline lens of the eye.

(US) A sculpture, typically wooden and painted, of a Native American Indian, of the sort prominently used in tobacco stores.

a small, fast boat designed with a long narrow platform and a planing hull to enable it to reach high speeds.

(slang) marijuana cigarette

Any of certain species of cicadas, especially in genus Magicicada, which are known for their 17- and 13-year life-cycles, during most of which they develop underground, emerging in large numbers for a short time as large and audible adults, all those emerging in a year constituting a brood.