(geology) Change to rock in physical contact with molten lava

(photography) A print made by exposing the printing paper to light through a negative that is placed directly onto it.

(inorganic chemistry) The industrial process for the manufacture of sulfuric acid from sulfur and oxygen

A delicate level pivoted so as to tilt when two parts of a measuring apparatus come into contact with each other; used in precise determinations of lengths and in the accurate graduation of instruments.

plural of contact level

plural of contact number

A telephone number that someone can be contacted on. / (geometry) Synonym of kissing number

plural of contact high

plural of contact language

plural of contact print