pyro-, pyr-

(Greek: fire, burn, burning, heat, produced by heating, hot; and sometimes also referring to "fever as shown at this link")

antipyrotic (s) (noun), antipyrotics (pl)
A medical agent that relieves pain and stimulates the healing of burns.
antipyrotic (adjective), more antipyrotic, most antipyrotic
A reference to anything of use in preventing or healing burns or pyrosis (heartburn which is a burning sensation in the epigastric region of the abdomen).
empyrean
1. The highest part of heaven, believed in ancient Greek and Roman times to contain pure fire or light and believed by some Christians to be the dwelling place of God.
2. The highest heaven, supposed by the ancients to contain the pure element of fire. 3. The sky or celestial sphere; the visible heavens; the firmament.
empyromancy
Divination by observing fire and smoke, or the objects, on a sacrificial fire.

Eggs, flour, and incense were used for this purpose as well as shoulder blades of the sacrificed victim.

glossopyrosis
A burning sensation of the tongue.
purogenic distillation
The thermal decomposition of hydrocarbons in a petroleum refinery at high temperatures, high pressures, or both.
pyracanth
Fire thorn or any of various thorny shrubs of the genus Pyracantha bearing small white flowers followed by hard red or orange-red berries.
pyracantha
Fire thorn or a thorny evergreen bush cultivated for its bright orange or red fruits. Native to Europe, Asia.
pyracantha
A shrub of the genus Pyracantha; the fire thorn.
pyre
1. Wood which has been heaped for burning a dead body; such as, a funeral rite.
2. A pile of burning material, especially a pile of wood on which a dead body is ceremonially cremated
pyrgeometer
1. Measuring effective terrestrial radiation or long wave, or infra-red, radiation originating by thermal emission from the earth's surface and/or its atmosphere which is distinguished from solar radiation.
2. An instrument that measures radiation from the earth's surface transmitted into space.
pyrheliometer
1. An apparatus for measuring the heating effects of the sun.
2. An instrument that measures the intensity of direct solar radiation.
3. A general term for the class of actinometers (name for any instrument used to measure the intensity of radiant energy, particularly that of the sun) that measure the intensity of direct solar radiation.
4. An instrument that measures the total intensity of direct solar radiation received by the earth.

Actinometers may be classified, accordingly to the quantities that they measure, in the following manner:

  • Pyrheliometer, which measures the intensity of direct solar radiation.
  • Pyranometer, which measures global radiation (the combined intensity of direct solar radiation and diffuse sky radiation)
  • Pyrgeometer, which measures the effective terrestrial radiation.
pyrite
Fire stone or a common iron sulfide mineral with a brassy metallic luster; used as a source of iron and sulfur.
pyroclasm
1. Composed chiefly of rock fragments of volcanic origin.
2. A churning cauldron or a pyroclastic flow.

There's an explosive arc, reminiscent of the way a solar flare arcs up and then collapses with a splash.

pyroclastic
Composed chiefly of rock fragments of explosive origin, especially those associated with explosive volcanic eruptions.

Volcanic ash, obsidian, and pumice are examples of pyroclastic materials.

Cross references of word groups that are related, directly, indirectly, or partly to: "fire, burn, glow, or ashes": ars-, ard-; -bust; cand-, cend-; caust-, caut-; crema-; ciner-; ether-; flagr-; flam-; focus, foci-; fulg-; gehenna-; ign-; phleg-; phlog-; pyreto-, -pyrexia; spodo- (ashes; waste); volcan-.