RAD

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does rad mean? 

• RAD (noun)
  The noun RAD has 2 senses:

1. a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material

2. the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)

  Familiarity information: RAD used as a noun is rare.

 Dictionary entry details 

• RAD (noun)

Sense 1

Meaning:

A unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material

Classified under:

Nouns denoting quantities and units of measure

Hypernyms ("rad" is a kind of...):

radioactivity unit (a measure of radioactivity)

Sense 2

Meaning:

The unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)

Classified under:

Nouns denoting quantities and units of measure

Synonyms:

rad; radian

Hypernyms ("rad" is a kind of...):

angular unit (a unit of measurement for angles)

Meronyms (parts of "rad"):

milliradian (a unit of angular distance equal to one thousandth of a radian)

 Context examples 

One gray is equal to an absorbed dose of one joule per kilogram of matter, or to 100 rads.

(Gray, NCI Thesaurus)

A unit of absorbed radiation dose equal to one million rad (10E6 rad), or 10000 Gy (10E4 Gy).

(Megarad, NCI Thesaurus)

A unit of plane angle measurement equal to 1/400 circle, 0.01 right angle, 0.9 degree, or 0,01570796 rad.

(Gon, NCI Thesaurus)