from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A basic rock whose pockmarked appearance is caused by the presence of numerous white, rounded, embedded spherules.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A kind of diorite or diabase with embedded whitish spherules, which give the rock a spotted appearance.
from the GNU version of the Collaborative International Dictionary of English
- n. A kind of diorite or diabase containing imbedded whitish spherules, which give the rock a spotted appearance.
from The Century Dictionary and Cyclopedia
- n. A rock in which there is a more or less distinctly concretionary arrangement, giving rise to pustular or pea-like forms which are disseminated through a finely crystalline ground-mass, and which, from their resemblance as seen on weathered surfaces to smallpox-pustules, have for hundreds of years made this rock an object of curiosity.
Latin varius various + -lite: compare French variolite. (Wiktionary)