noun, plural striae [strahy-ee] .
a slight or narrow furrow, ridge, stripe, or streak, especially one of a number in parallel arrangement: striae of muscle fiber.
Mineralogy. any of a series of parallel lines or tiny grooves on the surface of a crystal, indicative of the mode of growth.
Architecture. a flute on the shaft of a column.

1555–65; < Latin: furrow, channel Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
stria (ˈstraɪə)
n , pl striae
1.  geology Also called: striation any of the parallel scratches or grooves on the surface of a rock caused by abrasion resulting from the passage of a glacier, motion on a fault surface, etc
2.  fine ridges and grooves on the surface of a crystal caused by irregular growth
3.  biology, anatomy a narrow band of colour or a ridge, groove, or similar linear mark, usually occurring in a parallel series
4.  architect a narrow channel, such as a flute on the shaft of a column
[C16: from Latin: a groove]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

stria stri·a (strī'ə)
n. pl. stri·ae (strī'ē)

  1. A thin, narrow groove or channel.

  2. A thin line or band, especially one of several that are parallel or close together.

  3. A thin line, band, stripe, or streak distinguished from the tissue in which it is found; a striation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Striae trend right to left toward lowest part of the cirque.
Nowhere in the nine recommended areas are there good examples of glacial striae on bedrock.
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