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isomorphism

(Encyclopedia)isomorphism īˌsəmôrˈfĭzəm [key], of minerals, similarity of crystal structure between two or more distinct substances. Sodium nitrate and calcium sulfate are isomorphous, as are the sulfates of...

grease

(Encyclopedia)grease, mixture of lubricant and thickener. It is used to reduce friction between surfaces from which oils would leak away or cause damage by dripping, or where lubrication must be assured for extende...

toxin-antitoxin

(Encyclopedia)toxin-antitoxin, mixture of a poisonous substance, or toxin, with an antitoxin, or antibody, in such proportion that a large percentage of the toxin is neutralized by the antitoxin. Although formerly ...

rennet

(Encyclopedia)rennet, substance containing rennin, an enzyme having the property of clotting, or curdling, milk. It is used in the making of cheese and junket. Rennet is obtained from the stomachs of young mammals ...

Dewar flask

(Encyclopedia)Dewar flask [for Sir James Dewar], container after which the common thermos bottle is patterned. It consists of two flasks, one placed inside the other, with a vacuum between. The vacuum prevents the ...

ecstasy

(Encyclopedia)ecstasy, either of two drugs used for their euphoric effects. The original ecstasy, a so-called designer drug, also known as MDMA, is an analog of methamphetamine (see amphetamine). The other drug is ...

ferric sulfate

(Encyclopedia)ferric sulfate or iron (III) sulfate, chemical compound, Fe2(SO4)3, a yellow rhombic crystalline hygroscopic water-soluble salt that decomposes when heated to a temperature of 480℃. The enneahydrate...

Yambol

(Encyclopedia)Yambol or Jambol both: yämˈbôl [key], city (1993 pop. 91,119), SE Bulgaria. It is a commercial center and produces textiles, machinery, ceramics, and furniture. There are mineral springs nearby. Th...

petrolatum

(Encyclopedia)petrolatum pĕtrəlāˈtəm [key], colorless to yellowish-white hydrocarbon mixture obtained by fractional distillation of petroleum. In its jellylike semisolid form (known as petroleum jelly and also...

bloat

(Encyclopedia)bloat, excessive accumulation of gases in the rumen, the first stomach of a cud-chewing animal. Bloat is probably formed to a large extent by bacterial action. It occurs in all ruminants, but is most ...