Not affected by something.

To keep one thing inside another for a time.

relevant or appropriate.

clearly defined or identified. medicine or remedy effective in treating particular disease.

surroundings of living thing. Natural worlds in which plants and animals live.

arranged in categories. newspaper advertisements. To arrange things into groups of similar items.

The act of making things in factories. To create a story or explanation that is not true.

Various forms of aluminum oxide.

in way that relates to chemistry, or to interactions of substances as studied in chemistry.

mixture of elements. Series of buildings that are walled or fenced off. To make a mistake or problem worse.

When you your body heat is above normal.

set of railway vehicles forming train. To have as an essential, necessary or main part.

Compound containing nitrogen and a more electropositive element (such as phosphorus or a metal). heat steel in presence of ammonia or other nitrogenous material so as to increase hardness and corrosion resistance.

Number by which another number is multiplied. numerical or constant quantity placed before and multiplying variable in algebraic expression.

of great vertical extent. at or to considerable height.