Definition of pyro- in English:

pyro-

Syllabification: pyro-

combining form

1Of or relating to fire: pyromania
2 Chemistry & Mineralogy Denoting a compound or mineral that is formed or affected by heat or has a fiery color: pyrophosphate pyrope

Origin

from Greek pur 'fire'.

Definition of pyro- in:

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Word of the day internecine
Pronunciation: ˌɪntəˈniːsʌɪn
adjective
destructive to both sides in a conflict