a. Geol. and Min. Also sphærulitic. [f. prec. (sense 1) + -IC.]
1. Of rocks, etc.: Containing, or composed of, spherulites.
1833–4. J. Phillips, Geol., in Encycl. Metrop., VI. 761/1. That concretionary structure which reminds us of some kinds of obsidian and sphærulitic traps.
1863. Dana, Man. Geol., § 6. 88. Spherulitic obsidian. Contains small feldspathic concretions.
1889. Science-Gossip, XXV. 216. Pitchstone (ordinary, banded, and spherulitic).
2. Pertaining to, characteristic of, spherulites.
1878. Lawrence, trans. Cotta’s Rocks Class., 86. Spherulitic or Globuliferous. A texture so named, somewhat similar to the oolitic.
1879. Rutley, Stud. Rocks, xi. 184. Spherulitic structure is sometimes developed in artificial glass.
3. Having the form or character of a spherulite.
1888. Rutley, Rock-Forming Min., 130. Sections passing through the centres of these spherulitic bodies.
