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.
Jupiterimages/Photos.com/Getty Images. The theory of plate tectonics is a part of geology, which is the study of the earth and how it changes. Developed in the 1960s and 1970s, this theory states that the earthâs outer crust is made up of plates of rock that shift all over the globe.