incubator An equipment providing a closed controllable environment in which optimum conditions may be established for the nutrition, growth and preservation of organisms, whether bacterial or human. Incubators are used to culture bacteria and to promote the survival of premature babies. inÂ·cuÂ·baÂ·tor (in'kyÅ«-bÄ-tÅr)
Definitions for plate tectonic theory. tectonics, plate tectonics, plate tectonic theory(noun) the branch of geology studying the folding and faulting of the earth's crust. Chaldean Numerology. The numerical value of plate tectonic theory in Chaldean Numerology is: 5.
The modern plate tectonics theory, which has become widely accepted since the 1960s, states that the earth's outer layer, or lithosphere, is broken into several large slabs called plates. These plates, which hold the continents and oceans, are slowly but constantly moving around the planet.