Do you know the definition of rad? This article will provide you with all of the information you need on the word rad, including its definition, etymology, usage, example sentences, and more!
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According to The Free Dictionary, Collins English Dictionary and the American Heritage Unabridged Dictionary of the English Language, the word rad is an adjective that is most often used as a slang term to mean cool or awesome. If someone says something is pretty rad, they mean that it is pretty great. This slang word was popularized in the California surfing community. The pronunciation of rad is ræd. Do you do anything in a rad way?
This word can also refer to a unit in physics that is equivalent to an energy absorption per unit mass of 0.01 joule per kilogram of irradiated material. The former unit of 1 rad is equivalent to 100 ergs of energy per gram of material, or 0.01 gray. It is a unit of measurement of the amount of ionizing radiation absorbed from a radioactive source. This word can also be used in photometry to refer to a proposed unit of quantity of light equal to the amount of energy in luminous form. A milliradian is a unit of angular distance that is equal to one thousandth of a radian. A radian is a standard scientific unit used by scientists that measure angles from the center of a circle to refer to an arc equal in length to the radius. You might see it on the internet or in a journal, or in formulas with an integer.
According to The Free Dictionary, the word rad also has a plethora of different meanings as an acronym. If you do plan to use one of these different definitions for the acronym RAD, ensure that you are providing the reader or listener with the proper context to be able to decipher your intended meaning. This should be standard practice with any acronym that can have more than one definition. When in doubt, use the full form or full meaning of RAD, not the shorthand or abbreviation.
Rules for Archival Description (Canadian rules for organisation of archives)
Radio
Relais d’Accès Au Droit (French legal aid program)
Religious Affairs Directorate (Turkey)
Retiree Activity Day
Resource Availability Determination
Radial (street suffix)
Reconnaissance Automatique de Documents (French: Automatic Document Recognition)
Rite Aide Corporation (stock symbol)
Rational Application Developer (IBM)
Rapid Application Development (software development)
Reckless and Deadly (Raven Shield and Battlefield 2 gaming clan)
Rational Application Developer
Rapid Application Development
Retain Acquire Develop (marketing)
Recorded Announcement Device (telecommunications)
Radian
Requirements Approval Document (US Air Force)
Read All Day
Research and Academic Development (various schools)
Reservists on Active Duty (US DoD)
Radiation Absorbed Dose (unit of absorbed dose of ionizing radiation equal to an energy of 100 ergs per gram of irradiated material)
Required Award Date (US DoD)
Request for Authority to Develop
Research and Analysis Division (various locations)
Reichsarbeitsdienst (Labor Service of the German Third Reich)
Rural Action for Development
Réseau d’Activités À Distance (French: Remote Network Activities)
Many different languages also contain words that mean rad. You may notice that in this list of translations of rad from Word Sense that some of these words and phrases look and sound a lot like the word rad. These are called cognates, which is when translations look similar, sound similar, and mean something similar. These are usually formed when words have the same root or language of origin.
Overall, the word rad means either a unit of energy or radiation dose equivalent, a unit of plane angle between two radii of a circle that cut off on the circumference an arc equal in length to the radius according to the Systeme International d’Unites, or something that is cool. For disambiguation, make sure that you are clear about which category your definition of rad falls under for evaluation. These are important relationships.
Kevin Miller is a growth marketer with an extensive background in Search Engine Optimization, paid acquisition and email marketing. He is also an online editor and writer based out of Los Angeles, CA. He studied at Georgetown University, worked at Google and became infatuated with English Grammar and for years has been diving into the language, demystifying the do's and don'ts for all who share the same passion! He can be found online here.