Any of a variety of coarse-grained crystalline metamorphic rocks with a foliated structure that allows easy division into slabs or slates.

plural of schist

(geology) A metamorphosed schist composed mostly of quartz with some mica and/or tourmaline.

plural of quartz schist

(geology) alum slate

(geology) alternative form of greenschist

A jagged red blood cell fragment without central pallor, consequent to passage through small vessels with microthrombi, leaky prosthetic heart valves etc.

(pathology) Any of various diseases of humans caused by parasitic blood flukes of the genus Schistosoma.

(zoology) A parasitic flatworm which needs two hosts to complete its life cycle. The immature form infests freshwater snails and the adult lives in the blood vessels of birds and mammals, causing bilharzia in humans.

plural of schistosome