A perennial herb, Thelesperma megapotamicum (synonym Thelesperma gracile), native to the southwest and western plains of North America and used by the Hopi, Navajo and other American Indians for tea, as a dye, and for other herbal purposes.

A surname.

plural of Cota

(trigonometry) In a right triangle, the reciprocal of the tangent of an angle. Symbols: cot, ctg, or ctn

plural of cotangent

(organic chemistry) A white crystalline substance, C₁₂H₁₃NO₃, obtained from decomposition of narcotine.

(psychiatry) A rare mental disorder in which the patient believes he or she is dead (figuratively or literally), does not exist, or has lost parts of the body.

Cotard's syndrome.

simple past tense and past participle of coteach

The targeting of two things at the same time