a. [f. Gr. type *κλαστικός, f. κλαστός broken, f. κλά-ειν to break, break off.] a. Geol. Consisting of broken pieces of older rocks. b. Anat. (Of a model) Composed of a number of separable pieces; pertaining to such a model.
1875. Hamerton, Intell. Life, III. ix. 117. The clastic anatomical man-model of the ingenious doctor Auzoux.
1877. Green, Phys. Geol., 93. Rocks … made up of broken pieces of pre-existing rocks are spoken of as Clastic … or Derivative.
1879. Rutley, Study Rocks, xiv. 299. Among the fragmentary or clastic rocks.
1881. Syd. Soc. Lex., Clastic, fragile; separable into fragments. Term applied to models which can be taken to pieces.
