Toxicodendron rydbergii, an ivy-like species of Toxicodendron common in the western United States, well-known for its ability to causes an itching rash and blistering for most people, through urushiol, an oil that is a skin irritant.

A hypothetical psychological effect through which people who live in close domestic proximity during the first few years of their lives become desensitized to later sexual attraction. It is one explanation for the incest taboo.

A western-style competition at horse shows that evaluates horses on calm, responsive manners and a relaxed, slow gait.

(rare, nonstandard) An inhabitant of the Western Hemisphere

Pantherophis obsoletus, a non-venomous colubrid found in North America.

plural of Western Hemispherian

A fish-eating bird of prey of the species Pandion haliaetus.

A sign in chest radiography that represents a focus of oligemia seen distal to a pulmonary embolism.

A species of small deer (Capreolus capreolus) native to Europe and Asia Minor.

Sceloporus occidentalis, a North American lizard.