pyro- /pī-rō-/

1. Denoting: fire, heat, fever
2. Obtained by heating or as if by heating, or by removing (theoretically) a molecule of water, as in pyro-acetˈic, pyrophosphorˈic, pyrosulphuˈric, pyrotartarˈic, etc acid, related in this way to acetic, phosphoric, etc acid, and in the derivative salts pyrophosˈphate, pyrotarˈtrate, etc (chem)

pyroballogy /-balˈə-ji/ noun (Gr ballein to throw, and -logy; Sterne)

The science of artillery

pyrochemˈical adjective

Relating to, producing, or produced by, chemical changes at high temperatures

pyroclasˈtic adjective (Gr klastos broken; geology)

(of rocks) formed of fragments thrown out by volcanic action

pyroclasˈtics plural noun

Ash and other debris ejected by a volcano (also singular noun pyˈroclast)

pyro-elecˈtric adjective (physics)

1. Becoming positively and negatively electrified at opposite poles on heating or cooling
2. Of pyro-electricity

pyro-electricˈity noun

1. The property of being pyro-electric
2. The study of the phenomena shown by pyro-electric crystals

pyrogallol /-galˈol/ noun

A phenol obtained by heating gallic acid, used in photographic developing (also called pyrogallˈic acid)

pyˈrogen /-jen/ noun (see -gen; medicine)

A substance causing heat or fever

pyrogenic /pī-rō-jenˈik/, pyrogenetic /-jin-etˈik/ or pyrogenous /-rojˈə-nəs/ adjective

Produced by, or producing, heat or fever

pyrognostic /pī-rog-nosˈtik/ adjective

(see -gnostic under gnosis) relating to the testing of minerals by flame

pyrognosˈtics plural noun

The properties of a mineral revealed by such testing

pyrography /pī-rogˈrə-fi/ noun

(see -graphy) poker work

pyrogravure /-grə-vūrˈ/ noun

(Fr gravure engraving) pyrography

pyrokinesis /-kī-nēˈsis or -ki-nēˈsis/ noun

(Gr kīnēsis movement) the ability to start fires by thought alone

pyrolater /pī-rolˈə-tər/ noun

A fire-worshipper

pyrolˈatry noun

(see -latry) fire-worship

pyroligneous /-ligˈni-əs/ adjective (L ligneus, from lignum wood; chem)

Obtained by distillation of wood (pyroligneous acid wood vinegar, a mixture of acetic acid, methyl alcohol, etc; pyroligneous alcohol wood spirit, methyl alcohol)

pyrolusite /-lūˈsīt or -looˈsīt/ noun (Gr lousis washing, from its use in decolorizing molten glass; geology)

Naturally-occurring manganese dioxide

pyˈrolyse or (N American) pyˈrolyze transitive verb

To decompose by pyrolysis

pyrolysis /pi-rolˈi-sis/ noun

(see lysis) decomposition of a substance by heat

pyrolytic /-litˈik/ adjective

pyromancy /-man-si/ noun

(see -mancy) divination by fire

pyromāˈnia noun

An obsessive urge to set light to things

pyromāˈniac noun and adjective

pyromaniacal /-mə-nīˈə-kl/ adjective

pyromanˈtic adjective

Relating to pyromancy

pyromeride /pī-romˈər-īd/ noun (Gr meros part, as if meaning only partly fusible; geology)

A nodular rhyolite

pyrometallurgy /-metˈəl-ûr-ji or -met-alˈər-ji/ noun

The art and science of treating metals with high temperatures

pyrometer /pī-romˈi-tər/ noun

(see -meter) an instrument for measuring high temperatures

pyrometric /pī-rō-metˈrik/ or pyrometˈrical adjective

(pyrometric cones same as Seger cones)

pyromˈetry noun

pyromorphite /-mörˈfīt/ noun

(Gr morphē form) a minor ore (chloride and phosphate) of lead, so called because the globule formed by heating a small quantity of ore crystallizes on cooling

pyrophobia /-fōˈbi-ə/ noun

(see phobia) an irrational fear of fire

pyrophōˈbic noun and adjective

pyˈrophone /-fōn/ noun

(Gr phōnē sound) an organ producing interference-tones by pairs of flames in tubes, invented by Eugène Kastner (1852–82)

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