plate tectonics

noun plural 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

plate–tectonic

adjective

1969

First Known Use of plate tectonics

1969


PLATE TECTONICS Defined for English Language Learners

plate tectonics

noun plural but singular in construction

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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