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sim⋅i⋅lar

[sim-uh-ler]
–adjective
1. having a likeness or resemblance, esp. in a general way: two similar houses.
2. Geometry. (of figures) having the same shape; having corresponding sides proportional and corresponding angles equal: similar triangles.
3. Mathematics. (of two square matrices) related by means of a similarity transformation.

Origin:
1605–15; earlier similary < F similaire or ML similāris, equiv. to L simil(is) like, similar (akin to simul together; cf. simplex ) + -āris -ar 1


sim⋅i⋅lar⋅ly, adverb


1. like, resembling. See same.


1. different.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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sim·i·lar   (sĭm'ə-lər)   
adj.  
  1. Related in appearance or nature; alike though not identical.

  2. Mathematics Having corresponding angles equal and corresponding line segments proportional. Used of geometric figures: similar triangles.


[French similaire, from Latin similis, like; see sem-1 in Indo-European roots.]
sim'i·lar·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

similar 
1611 (earlier similary, 1564), from Fr. similaire, from an extended form of L. similis "like," from Old L. semol "together," from PIE base *sem-/*som- "same" (see same).
Online Etymology Dictionary, © 2001 Douglas Harper
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