plate tectonics

noun, plural in form but singular in construction

Definition of plate tectonics

  1. 1 :  a theory in geology: the lithosphere of the earth is divided into a small number of plates which float on and travel independently over the mantle and much of the earth's seismic activity occurs at the boundaries of these plates

  2. 2 :  the process and dynamics of tectonic plate movement; also :  a similar process on a body other than earth — compare continental drift

plate–tectonic

adjective

First Known Use of plate tectonics

1969


PLATE TECTONICS Defined for English Language Learners

plate tectonics

noun

Definition of plate tectonics for English Language Learners

  • geology : a scientific theory that the Earth's surface is made of very large sections that move very slowly; also : the movements of the large sections that form the Earth's surface


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