1. Produced under conditions involving intense heat
   "igneous rock is rock formed by solidification from a molten state; especially from molten magma"; "igneous fusion is fusion by heat alone"
   - pyrogenic, pyrogenous 
2. Produced by the action of fire or intense heat
   "rocks formed by igneous agents"
   - eruptive 
3. Like or suggestive of fire
   "an igneous desert atmosphere"
   - fiery

See also: heat, hot

Antonym: aqueous

Encyclopedia: Igneous

• Pezizales
• Pezophaps
• Pezophaps solitaria
• Pfalz
• pfannkuchen
• PFC
• pfennig
• pfft
• PFLP
• PFLP-GC
• PG
• pH
• pH scale
• phacelia
• Phacelia campanularia
• Phacelia minor
• Phacelia tanacetifolia
• Phacelia whitlavia
• Phacochoerus
• phacoemulsification
• phaeochromocytoma
• Phaeophyceae
• Phaeophyta
• Phaethon
• Phaethontidae