Ef*fu"sive (?), a. Pouring out; pouring forth freely. "Washed with the effusive wave."
Pope.
Effusive rocks Geol., volcanic rocks, in distinction from so-called intrusive, or plutonic, rocks.
-- Ef*fu"sive*ly, adv. -- Ef*fu"sive*ness, n.
© Webster 1913. | 
