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(Science: chemical) A compact granular cryptocrystalline mineral of a dull grayish or greenish white colour. It is a hydrous alkaline silicate, and is derived from the alteration of other minerals, as iolite.

Origin: So called from Pini, a mine in Saxony.

1. (Paleon) Any fossil wood which exhibits traces of having belonged to the pine family.

2. (Science: chemistry) A sweet white crystalline substance extracted from the gum of a species of pine (pinus Lambertina). It is isomeric with, and resembles, quercite.

Origin: L. Pinus the pine tree.