### What does **r** mean?

# Definitions for r

r

#### Here are all the possible meanings and translations of the word **r**.

### Princeton's WordNet

a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air

(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole

the 18th letter of the Roman alphabet

the length of a line segment between the center and circumference of a circle or sphere

### Wikipedia

R, or r, is the 18th letter of the modern English alphabet and the ISO basic Latin alphabet. Its name in English is ar (pronounced ), plural ars, or in Ireland or .

### Webster Dictionary

r, the eighteenth letter of the English alphabet, is a vocal consonant. It is sometimes called a semivowel, and a liquid. See Guide to Pronunciation, // 178, 179, and 250-254

### Freebase

R is the eighteenth letter of the ISO basic Latin alphabet.

### The Standard Electrical Dictionary

(a) Abbreviation and symbol for Reamur, as 10º R., meaning 10º by the Reamur thermometer. (See Reamur Scale.) (b) Symbol for resistance, as in the expression of Ohm's Law C=E. (rho, Greek r) Symbol for specific resistance.

### Dictionary of Nautical Terms

In the muster-book means run, and is placed against those who have deserted, or missed three musters.

### Suggested Resources

The r symbol -- In this

**Symbols.com**article you will learn about the meaning of the r symbol and its characteristic.Quotes by r -- Explore a large variety of famous quotes made by r on the

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### Matched Categories

### Numerology

The numerical value of r in Chaldean Numerology is:

**2**The numerical value of r in Pythagorean Numerology is:

**9**