Glacial theory
Glacial Gla"cial, a. [L. glacialis, from glacies ice: cf. F. glacial.] 1. Pertaining to ice or to its action; consisting of ice; frozen; icy; esp., pertaining to glaciers; as, glacial phenomena. --Lyell. [1913 Webster]

2. (Chem.) Resembling ice; having the appearance and consistency of ice; -- said of certain solid compounds; as, glacial phosphoric or acetic acids. [1913 Webster]

{Glacial acid} (Chem.), an acid of such strength or purity as to crystallize at an ordinary temperature, in an icelike form; as acetic or carbolic acid.

{Glacial drift} (Geol.), earth and rocks which have been transported by moving ice, land ice, or icebergs; bowlder drift.

{Glacial epoch} or {Glacial period} (Geol.), a period during which the climate of the modern temperate regions was polar, and ice covered large portions of the northern hemisphere to the mountain tops.

{Glacial theory} or {Glacial hypothesis}. (Geol.) See {Glacier theory}, under {Glacier}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • glacial theory — noun : glacier theory …   Useful english dictionary

  • Glacial — Gla cial, a. [L. glacialis, from glacies ice: cf. F. glacial.] 1. Pertaining to ice or to its action; consisting of ice; frozen; icy; esp., pertaining to glaciers; as, glacial phenomena. Lyell. [1913 Webster] 2. (Chem.) Resembling ice; having the …   The Collaborative International Dictionary of English

  • Glacial acid — Glacial Gla cial, a. [L. glacialis, from glacies ice: cf. F. glacial.] 1. Pertaining to ice or to its action; consisting of ice; frozen; icy; esp., pertaining to glaciers; as, glacial phenomena. Lyell. [1913 Webster] 2. (Chem.) Resembling ice;… …   The Collaborative International Dictionary of English

  • Glacial drift — Glacial Gla cial, a. [L. glacialis, from glacies ice: cf. F. glacial.] 1. Pertaining to ice or to its action; consisting of ice; frozen; icy; esp., pertaining to glaciers; as, glacial phenomena. Lyell. [1913 Webster] 2. (Chem.) Resembling ice;… …   The Collaborative International Dictionary of English

  • Glacial epoch — Glacial Gla cial, a. [L. glacialis, from glacies ice: cf. F. glacial.] 1. Pertaining to ice or to its action; consisting of ice; frozen; icy; esp., pertaining to glaciers; as, glacial phenomena. Lyell. [1913 Webster] 2. (Chem.) Resembling ice;… …   The Collaborative International Dictionary of English

  • Glacial hypothesis — Glacial Gla cial, a. [L. glacialis, from glacies ice: cf. F. glacial.] 1. Pertaining to ice or to its action; consisting of ice; frozen; icy; esp., pertaining to glaciers; as, glacial phenomena. Lyell. [1913 Webster] 2. (Chem.) Resembling ice;… …   The Collaborative International Dictionary of English

  • Glacial period — Glacial Gla cial, a. [L. glacialis, from glacies ice: cf. F. glacial.] 1. Pertaining to ice or to its action; consisting of ice; frozen; icy; esp., pertaining to glaciers; as, glacial phenomena. Lyell. [1913 Webster] 2. (Chem.) Resembling ice;… …   The Collaborative International Dictionary of English

  • Würm glacial stage — ▪ geology       major division of late Pleistocene deposits and time in Alpine Europe (the Pleistocene epoch began about 1,600,000 years ago and ended about 10,000 years ago). The Würm glacial stage followed the Riss Würm interglacial and is… …   Universalium

  • Post-glacial rebound — A model of present day mass change due to post glacial rebound and the reloading of the ocean basins with seawater. Blue and purple areas indicate rising due to the removal of the ice sheets. Yellow and red areas indicate falling as mantle… …   Wikipedia

  • Sahara pump theory — The Sahara Pump Theory explains how flora and fauna left Africa to penetrate the Middle East and beyond to Europe and Asia. African pluvial periods are associated with a wet Sahara phase during which larger lakes and more rivers exist. [cite… …   Wikipedia

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