# ratio

[rey-shoh, -shee-oh] /ˈreɪ ʃoʊ, -ʃiˌoʊ/
noun, plural ratios.
1.
the relation between two similar magnitudes with respect to the number of times the first contains the second:
the ratio of 5 to 2, written 5:2 or 5/2.
2.
proportional relation; rate:
the ratio between acceptances and rejections.
3.
Finance. the relative value of gold and silver in a bimetallic currency system.
Origin of ratio
1630-1640
1630-40; < Latin ratiō a reckoning, account, calculation, derivative (see -tion) of the base of rērī to judge, think
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for ratios
• This storm's ratios could be as high as 15 or 20:1, meaning there'll be more bang for the H2O buck.

January 1, 2014
• (We are assuming a world without the crazy 103% LTV ratios of the bubble).

• After all, who is going to pressure CEOs to bring their ratios down?

September 18, 2013
British Dictionary definitions for ratios

## ratio

/ˈreɪʃɪˌəʊ/
noun (pl) -tios
1.
a measure of the relative size of two classes expressible as a proportion: the ratio of boys to girls is 2 to 1
2.
(maths) a quotient of two numbers or quantities See also proportion (sense 6)
Word Origin
C17: from Latin: a reckoning, from rērī to think; see reason
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ratios

## ratio

n.

1630s, "reason, rationale," from Latin ratio "reckoning, numbering, calculation; business affair, procedure," also "reason, reasoning, judgment, understanding," from rat-, past participle stem of reri "to reckon, calculate," also "think" (see reason (n.)). Mathematical sense "relationship between two numbers" is attested from 1650s.

Online Etymology Dictionary, © 2010 Douglas Harper
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ratios in Medicine

ratio ra·tio (rā'shō, rā'shē-ō')
n. pl. ra·tios

1. Relation in degree or number between two similar things.

2. The relation between two quantities expressed as the quotient of one divided by the other.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ratios in Science
 ratio   (rā'shō, rā'shē-ō')    A relationship between two quantities, normally expressed as the quotient of one divided by the other. For example, if a box contains six red marbles and four blue marbles, the ratio of red marbles to blue marbles is 6 to 4, also written 6:4. A ratio can also be expressed as a decimal or percentage.
The American Heritage® Science Dictionary
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ratios in Culture
ratio [(ray-shee-oh, ray-shoh)]

An expression of the relative size of two numbers by showing one divided by the other.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
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### Difficulty index for ratio

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### Word Value for ratios

6
6
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