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单词 r
释义

r

1 of 4

noun

ˈär How to pronounce r (audio)
plural r's or rs ˈärz How to pronounce r (audio)
often capitalized, often attributive
1
a
: the 18th letter of the English alphabet
b
: a graphic representation of this letter
c
: a speech counterpart of orthographic r
2
: a graphic device for reproducing the letter r
3
: one designated r especially as the 18th in order or class
4
: something shaped like the letter R

r

2 of 4

abbreviation (1)

1
radius
2
rain
3
range
4
rare
5
real
6
recto
7
red
8
repeat
9
rerun
10
resistance
11
right
12
roentgen
13
rook
14
rough
15
run

R

3 of 4

abbreviation (2)

1
rabbi
2
radial
3
radical
used especially of a monovalent hydrocarbon radical
4
Rankine
5
Reaumur
6
recipe
7
registered trademark
often enclosed in a circle
8
regular
9
Republican
10
river
11
R-value

R

4 of 4

certification mark

used to certify that a motion picture is of such a nature that admission is restricted to persons over a specified age (such as 17) unless accompanied by a parent or guardian
compare g, nc-17, pg, pg-13

Example Sentences

Noun There are two r's in “tomorrow.” “River” begins and ends with r.

Word History

First Known Use

Noun

before the 12th century, in the meaning defined at sense 1a

Kids Definition

r 1 of 4

noun

ˈär How to pronounce r (audio)
plural r's or rs
ˈärz
often capitalized
: the 18th letter of the English alphabet

r.

2 of 4

abbreviation

right

R

3 of 4

abbreviation

regular

R.

4 of 4

abbreviation

rabbi

Medical Definition

r 1 of 3

abbreviation

roentgen

R

2 of 3

abbreviation

1
Reaumur
2
rough
used in bacteriology

R

3 of 3

symbol

chemical group and especially an organic chemical group
thiols have the general formula RSH
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更新时间:2025/3/4 5:32:12