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The Collaborative International Dictionary
Metamorphic

Metamorphic \Met`a*mor"phic\, a. [See Metamorphosis.]

  1. Subject to change; changeable; variable.

  2. Causing a change of structure.

  3. (Geol.) Pertaining to, produced by, or exhibiting, certain changes which minerals or rocks may have undergone since their original deposition; -- especially applied to the recrystallization which sedimentary rocks have undergone through the influence of heat and pressure, after which they are called metamorphic rocks.

Douglas Harper's Etymology Dictionary
metamorphic

1833 (Lyell) in the geological sense, in reference to rock whose form has been changed by heat or pressure, from metamorphosis + -ic. Earlier (1816) in non-technical sense "characterized by change."

Wiktionary
metamorphic

a. 1 (context geology English) Having been structurally altered as a result of, or resulting from, exposure to intense heat and/or pressure (at the contact zone between colliding plates, for example). 2 Of or relating to the (w: Metamorphic Technique), a form of massage influenced by reflexology. n. (context mineralogy English) A rock that has been changed from its original form by subjection to heat and/or pressure.

WordNet
metamorphic
  1. adj. of or relating to metamorphosis (especially of rocks); "metamorphic stage"; "marble is a metamorphic rock that takes a high polish" [syn: metamorphous]

  2. characterized by metamorphosis or change in physical form or substance [ant: nonmetamorphic]

Wikipedia
Metamorphic (disambiguation)

The term Metamorphic can be associated with a number of meanings:

Usage examples of "metamorphic".

When the Rowan began the metamorphic massage which Lusena had taught her as being useful in reducing shock, Moria complained that the Rowan was deliberately bruising her feet.

These metamorphic phenomena, though important, are obscure, and their elucidation demands some knowledge of petrographic science, that branch of geology which considers the principles of rock formation.

In the metamorphic rocks no organic remains have been found, and they are geologically below all the rocks that do contain traces of animal life.

It was true, then, that certain Amazons had not only metamorphic but rejuvenating powers!

If these most ancient beds had been wholly worn away by denudation, or obliterated by metamorphic action, we ought to find only small remnants of the formations next succeeding them in age, and these ought to be very generally in a metamorphosed condition.

The impact brecciation had created all kinds of useful metamorphic rock, and greenhouse-gas minerals were a common secondary find throughout the apron.

The impact brecciation had created all kinds of useful metamorphic rock, and green-house-gas minerals were a common secondary find throughout the apron.

Tolland and Corky had been discussing these metallic chondrules for some time now, talking in scientific terms well over Rachel's head—equilibrated olivine levels, metastable glass matrices, and metamorphic rehomogenation.

Even when the rock is cooked by deep heat, becoming metamorphic - changing its chemical structure - the crystal of zircon survives.

It's a geological formation of igneous and metamorphic rocks, composed primarily of granites and gneisses, underlying parts of Connecticut, New York, Pennsylvania, and New Jersey.

For it to be trapped in this basalt implies a metamorphic slush - lava partially melting rock in the throat above the magma chamber, and then throwing it all up.

The cuttings, screened from the mud as it flowed back into the sump pit, showed us still in the metamorphic rock.

They do have words for igneous rock, sedimentary rock, metamorphic rock, rock underfoot, rock dropping on your helmet from above, and rock which looked interesting and which they could have sworn they left here yesterday.

Granny Weatherwax, who lived in a cottage that was as olde-worlde as it was possible to be without being a lump of metamorphic rock, made no comment.

And Id have to bet that there wasnt a metamorphic rock within a thousand klicks of that site.