# ratio

[ rey-shoh, -shee-oh ]

/ ˈreɪ ʃoʊ, -ʃiˌoʊ /

### noun, plural ra·tios.

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.

proportional relation; rate: the ratio between acceptances and rejections.

Finance. the relative value of gold and silver in a bimetallic currency system.

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## RELATED WORDS

## Nearby words

rating, rating badge, rating nut, ratingen, ratiné, ratio, ratio scale, ratio test, ratiocinate, ratiocination, ratiometer

## Origin of ratio

1630–40; < Latin ratiō a reckoning, account, calculation, derivative (see -tion) of the base of rērī to judge, think

## Definition for ratio (2 of 2)

## ultima ratio regum

[ oo l-ti-mah rah-tee-oh rey-goo m; English uhl-tuh-muh rey-shee-oh ree-guh m ]

/ ˈʊl tɪˌmɑ ˈrɑ tiˌoʊ ˈreɪ gʊm; English ˈʌl tə mə ˈreɪ ʃiˌoʊ ˈri gəm /

### Latin.

the final argument of kings (a resort to arms): motto engraved on the cannon of Louis XIV.

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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

## Examples from the Web for ratio

## British Dictionary definitions for ratio

## ratio

/ (ˈreɪʃɪˌəʊ) /

### noun plural -tios

a measure of the relative size of two classes expressible as a proportionthe ratio of boys to girls is 2 to 1

## Word Origin for ratio

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

## Medicine definitions for ratio

## ratio

[ rā′shō, rā′shē-ō′ ]

### n. pl. ra•tios

Relation in degree or number between two similar things.

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.

## Science definitions for ratio

## 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
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

## Culture definitions for ratio

## ratio

[ (ray-shee-oh, ray-shoh) ]

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

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.