# rhombus

[rom-buh s] /ˈrɒm bəs/
noun, plural rhombuses, rhombi
[rom-bahy] /ˈrɒm baɪ/ (Show IPA)
1.
an oblique-angled equilateral parallelogram; any equilateral parallelogram except a square.
2.
an equilateral parallelogram, including the square as a special case.
3.
a rhombohedron.
Origin of rhombus
1560-1570
1560-70; < Latin < Greek rhómbos anything that may be spun around, derivative of rhémbein to revolve
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for rhombus
Historical Examples
• Or why the Noble Antoninus in some sence doth call the soul it self a rhombus?

Thomas Browne
• What is it about the rhombus, pa, and when am I to read Juvenal?

Richard Doddridge Blackmore
• When these notes are represented on the combined staffs with the counters, the resulting design is a rhombus.

Maria Montessori
• The rhombus maximus (Cuvier), said to be the best, and excepting the halibut, the largest of our flat fishes.

Arnold Cooley
• They are in fact the duplicates, on a small scale, of the rhombus, already described.

• The Turbot, rhombus maximus (Fig. 371), resembles in its general form a lozenge, whence its name of rhombus.

Louis Figuier
• Of two cones of one common base is made Archimede's rhombus, as here, whose geodsy shall be cut of two cones.

Peter Ramus
• Three forms of the rhombus have come under my own observation, each and all apparently connected in symbolism with the lightning.

• The triangles of the rhombus are different, for they are divided by opposite diagonal lines.

Maria Montessori
• The Apache name for the rhombus is tzi-ditindi, the "sounding wood."

British Dictionary definitions for rhombus

## rhombus

/ˈrɒmbəs/
noun (pl) -buses, -bi (-baɪ)
1.
an oblique-angled parallelogram having four equal sides Also called rhomb Compare square (sense 1)
Word Origin
C16: from Greek rhombos something that spins; related to rhembein to whirl
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for rhombus
n.

1560s, from Late Latin rhombus, from Greek rhombos "rhombus, rhomb, lozenge; spinning top, maghic wheel used by sorcerers; a spinning motion," from rhembesthai "to spin, whirl," from PIE *wrembh-, from *werbh- "to turn, twist, bend" (cf. Old English weorpan "to throw away"), from root *wer- (3) "to turn, bend" (see versus).

Online Etymology Dictionary, © 2010 Douglas Harper
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rhombus in Science
 rhombus   (rŏm'bəs)    Plural rhombuses or rhombi (rŏm'bī)A parallelogram with four equal sides; an equilateral parallelogram.rhomboid, rhomboidal adjective
The American Heritage® Science Dictionary
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### Word Value for rhombus

14
16
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