ef*fu"sive*ness
Webster's Dictionary (GCIDE)
effusiveness \ef*fu"sive*ness\ n. a friendly open trait of a talkative person; enthusiasm exhibited with little restraint.
Syn: expansiveness. [WordNet 1.5 +PJC]
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]