'Effusive rocks' definitions:

Definition of 'Effusive rocks'

From: GCIDE
  • effusive \ef*fu"sive\, a.
  • 1. Pouring out; pouring forth freely. [archaic] "Washed with the effusive wave." --Pope. [1913 Webster]
  • 2. (Geol.) formed by an outpouring of molten lava, or pertaining to rocks so formed. [PJC]
  • 3. overly demonstrative; expressing emotion in an unrestrained manner; exhibiting unrestrained enthusiasm; -- of people and human actions; as, effusive thanks; an effusive letter of recommendation. Contrasted with reserved. [WordNet sense 1+2]
  • Syn: gushing, gushy, burbling, burbly. [PJC]
  • Effusive rocks (Geol.), volcanic rocks formed by a nonexplosive outpouring of lava in molten or plastic form; in distinction from so-called intrusive, or plutonic, rocks. -- {Ef*fu"sive*ly}, adv. -- {Ef*fu"sive*ness}, n. [1913 Webster]