plural of twin crystal

The dung of sheep. / (colloquial) A remote control. / (colloquial, dated) A boy servant, or page. / (slang) A policeman.

(immunology) Anything that provokes immunopotentiation; an immunostimulant

Any of a group of dinoflagellates of the zooxanthellae, represented by genus Symbiodinium and its allies, symbionts involved in coral.