R

Examples

• All

• Today we see windows with Energy Star ratings that rival wall R-values.

  Academic text (2010)

• The OLS regression for heroin mortality rates for all variables achieved an adjusted R-squared of 0.284.

  Academic text (2018)

• ATG-S entered at step 1, yielding an R of 0.42.

  Academic text (1999)

• Higher correlations were seen for diarrhea (R = 0.828-0.926) than for nausea/vomiting (R = 0.729-0.866) across multiple age groups.

  Academic text (2013)

• The building's insulation has an R-value of 20, indicating good thermal resistance.

• To achieve energy efficiency, homes should strive for R-values above 30 in their walls.

• The contractor explained that using materials with a high R-value can significantly reduce heating costs.

Synonyms

R

roentgen

vsR

• Archaic

2 9.9

A unit for measuring exposure to X-rays or gamma rays

is the same measure but usually written as a single-letter symbol

R

röntgen

vsR

• Archaic

9.9

A unit for measuring how much X-ray or gamma radiation hits the air

gives the technical definition instead, specifying charge in one cubic centimeter of dry air

Compounds

C

CD-R

1 4.1

A disc you can write to only once that holds music or files

R

R-2

• NSFW

9.9

A very strong sleeping pill people often use illegally that can be dangerous

R

R and B

3.2

A style of popular American music with strong blues and jazz roots

T

the r-word

• Slur

9.9

A rude word used to insult people with an intellectual disability, replaced by the letter R

Surface Forms

Etymology