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pyrimidine
pyrite
pyro-
pyrocatechol
pyrocellulose
pyrochemical
pyroclastic
pyroconductivity
pyroelectricity
pyrogallol
pyrogen
pyrogenic
pyrography
pyroligneous acid
pyrolusite
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pyrolyse
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pyrheliometer
pyr·he·li·om·e·ter [ pr heelee ómmətər ] (plural pyr·he·li·om·e·ters)


noun 
Definition:
 
instrument measuring strength of Sun's radiation: an instrument that measures the intensity of the Sun's radiation received at the Earth's surface
[Mid-19th century. < Greek pur "fire" + helios "sun"]

pyr·he·li·o·met·ric [ pr heelee ə méttrik ] adjective
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