| 释义 |
diabaseenUK
di·a·base D0191500 (dī′ə-bās′) n. A dark-gray to black, fine-textured igneous rock composed mainly of feldspar and pyroxene and used for monuments and as crushed stone.
[From French diabase, originally meaning "diorite," (now "basalt or gabbro lightly modified by metamorphism"), coined by French mineralogist Alexandre Brongniart (1770-1847), probably from Greek diabasis, a crossing over (from diabainein, to pass through or over; see diabetes; the rock being so called because it is often found as intrusive sills and dikes in other rocks), or perhaps an alteration of an intended French *dibase (di-, two, from Greek di-; see di-1 + base, basis, from Old French; see base1; the rock being so called in reference to feldspar and amphibole, two important constituent minerals of diorite).] diabase (ˈdaɪəˌbeɪs) n1. (Geological Science) Brit an altered dolerite2. (Geological Science) US another name for dolerite[C19: from French, from Greek diabasis a crossing over, from diabainein to cross over, from dia- + bainein to go] ˌdiaˈbasic adjdi•a•base (ˈdaɪ əˌbeɪs)
n. a fine-grained gabbro occurring as minor intrusions. [1830–40; < French, =dia- (error for di- two) + base base1] di`a•ba′sic, adj. diabaseenUK
diabase: see basaltbasalt
, fine-grained rock of volcanic origin, dark gray, dark green, brown, reddish, or black in color. Basalt is an igneous rock, i.e., one that has congealed from a molten state.
..... Click the link for more information. .diabase[′dī·ə‚bās] (petrology) An intrusive rock consisting principally of labradorite and pyroxene. diabaseRock having the same composition as basalt, but with larger crystals which are just visible to the unaided eye; also called traprock.AcronymsSeeDIBSThesaurusSeebasalt |