plural of grayhound

(Canada, US) A person with gray hair; an elderly person.

(mineralogy) A hexagonal-trapezohedral mineral containing calcium, hydrogen, lead, oxygen, phosphorus, and thorium.

Alternative spelling of greyline

plural of graybody

(US, slang) jail, prison

Of or relating to Asa Gray (1810–1888), American botanist.

(organic chemistry) A tricyclic diterpenoid hydrocarbon that is the basis of the structure of the grayanotoxins

(organic chemistry) Any of a family of toxins found in rhododendrons and similar plants

plural of grayanotoxin