# Ratios

## ratio

[rey-shoh, -shee-oh]
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:
1630–40; < Latin ratiō a reckoning, account, calculation, derivative (see -tion) of the base of rērī to judge, think

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World English Dictionary
 ratio (ˈreɪʃɪˌəʊ) —n , 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 See also proportion a quotient of two numbers or quantities [C17: from Latin: a reckoning, from rērī to think; see reason]

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Word Origin & History

ratio
1636, "reason, rationale," from L. ratio "reckoning, calculation, business affair, procedure," also "reason," from rat-, pp. stem of reri "to reckon, calculate," also "think" (see reason). Mathematical sense is attested from 1660.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

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
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Science Dictionary
 ratio   (rā'shō, rā'shē-ō')  Pronunciation Key  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.
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Cultural Dictionary
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