As a proper noun rex
is (formal, usually italicized) the reigning king.
As an initialism rea is
(us|legal) request for an equitable adjustment, a term used in contracting with government entities in the united states to indicate that compensation is sought for unexpected costs arising in the fulfillment of a contract.
rex
Noun
(rexes)
An animal which has a genetic recessive variation that causes the guard hairs to be very short or fully lacking.
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