from
The Collaborative International Dictionary of English v.0.48
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]