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lineation

[lin-ee-ey-shuh n] /ˌlɪn iˈeɪ ʃən/
noun
1.
an act or instance of marking with or tracing by lines.
2.
a division into lines.
3.
an outline or delineation.
4.
an arrangement or group of lines.
Origin
1350-1400
1350-1400; Middle English lyneacion < Late Latin līneātiōn- (stem of līneātiō) the drawing of a line, Latin: direction, line. See lineate, -ion
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for lineation
  • In many places the rock has a strong quartz-rod lineation, and locally, two foliations.
  • The lineation is not horizontal, but is tilted down toward the southwest at an angle of several degrees.
  • Typically is compositionally homogeneous, with strong foliation and locally well-developed lineation defined by major minerals.
  • It has a heterogeneous and in places, contains cognate and foreign xenoliths aligned parallel to an apparent flow lineation.
British Dictionary definitions for lineation

lineation

/ˌlɪnɪˈeɪʃən/
noun
1.
the act of marking with lines
2.
an arrangement of or division into lines
3.
an outline or contour
4.
any linear arrangement involving rocks or minerals, such as a parallel arrangement of elongated mineral grains
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for lineation
n.

late 14c., from Latin lineationem (nominative lineatio) "the making in a straight line," noun of action from past participle stem of lineare (see lineament).

Online Etymology Dictionary, © 2010 Douglas Harper
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