A sharp triangular projection from a bone.

An early colour photography process using two glass plates: a colour screen plate, with red, green and blue filters, and a standard black-and-white negative plate.

A method of manufacturing flat glass in which the glass is drawn against gravity in an upward direction.

(photography) To process film in a chemical solution intended for a different type of film.

(computing) Across more than one process; crossing a process boundary.

(inorganic chemistry) A method for the production of metallic sodium by the electrolysis of molten sodium hydroxide

(inorganic chemistry) The nitrogen-fixation reaction of nitrogen gas and hydrogen gas, over an enriched iron or ruthenium catalyst, used industrially to produce ammonia.

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

The first commercially successful method of manufacturing synthetic gemstones, involving the melting of a finely powdered substance using an oxyhydrogen flame and crystallising the melted droplets into a boule.

(chemistry) A chemical process for the conversion of wood into wood pulp (for paper manufacture)