Definition. Moyamoya is the Japanese word for âpuff of smokeâ, which is how the tangled blood vessels caused by the blocked arteries at the base of the brain appear on angiography.Moyamoya disease is a rare, progressive cerebrovascular disorder that generally affects children, although it can affect adults.oyamoya is the Japanese word for âpuff of smokeâ, which is how the tangled blood vessels caused by the blocked arteries at the base of the brain appear on angiography.
Antimony trisulfide is a gray solid. It reacts with hydrochloric acid to make hydrogen sulfide and an antimony(III) compound. It dissolves in potassium hydroxide. It burns in air to make antimony(III) oxide and sulfur dioxide. It is a reducing agent. Occurrence. Stibnite is the mineral form of antimony trisulfide. Preparation. Antimony trisulfide is made in the laboratory by reacting any antimony(III) compound with hydrogen sulfide. Uses. Antimony trisulfide is used in cosmetics; in this area it is called kohl. It is used in pyrotechnics to make a glitter effect.
Medical Definition of ANTIMONY. : a trivalent and pentavalent metalloid element that is commonly metallic silvery white, crystalline, and brittle and is used especially in alloys and semiconductors and in medicine as a constituent of various antiprotozoal agents (as tartar emetic)âsymbol Sb; see element table.. : a trivalent and pentavalent metalloid element that is commonly metallic silvery white, crystalline, and brittle and that is used especially in alloys, semiconductors, and flame-retardant substances â see element table. See antimony defined for English-language learners. See antimony defined for kids.