(agriculture, transitive) To cut with a sickle. / (transitive) To deform (as with a red blood cell) into an abnormal crescent shape.

Shaped like the blade of a sickle; crescent-shaped.

A Catholic sacrament in which a priest anoints a sick or dying person with oil and prays for his salvation. It was previously known as extreme unction and the last rites.

Of or relating to Sicily or its inhabitants.

The language of Sicily.

A native of Sicily. / Any chess opening that starts 1 e4 c5.

especially, African sleeping sickness, an endemic infectious disease of humans and animals in tropical Africa, caused by a parasitic trypanosome, transmitted by the tsetse fly and characterized by fever, severe headache, joint pains and lymph node swelling in the early stages, followed by a neurological phase of extreme weakness, sleepiness, and deep coma leading to death

(Britain) A disease characterized by sickle-shaped red blood cells.

(pathology) A sometimes fatal condition resulting from the formation of nitrogen bubbles in the blood and tissues, because of too rapid decompression, seen especially in deep-sea divers ascending rapidly from a dive. It is characterized by severe pains in the joints and chest, skin irritation, cramps, nausea, and paralysis.

The adverse environmental conditions in a building that pose a health risk to its occupants. / The symptoms experienced by people who work there.