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prebook combined form of book.
prebreakfast combined form of breakfast.
prec. abbreviation of "preceded" or "preceding."
Precambrian of, relating to, or designating the earliest geological era, ending approximately 600 million years ago, when the earth's crust was formed and the first evidence of life appeared. [2 definitions]
precancel to cancel (a stamp) before mailing. [2 definitions]
precancerous having or showing the possibility or likelihood of becoming cancerous.
precapitalist combined form of capitalist.
precarious so unstable or insecure as to be dangerous; risky. [3 definitions]
precast concrete concrete that has been cast into form, as of a block, column, or bridge section, before being put in place.
precaution an action or measure taken beforehand to avoid or prevent a dangerous circumstance, or to ensure a favorable result. [2 definitions]
precautionary of, relating to, or consisting of a precaution. [2 definitions]
precede to come before in time. [3 definitions]
precedence the act of preceding. [3 definitions]
precedent an act that serves or may serve as an example for future actions of a similar nature. [3 definitions]
precedential of or being a precedent. [2 definitions]
preceding that comes, goes, or exists before; prior.
precentor one who leads the music in a church, esp. the church choir.
precept a basic rule, principle, or directive that guides action, moral conduct, or thought.
preceptor one who teaches; instructor.
precession the act or condition of preceding; precedence. [3 definitions]
precession of the equinoxes the earlier occurrence of the equinoxes in each sidereal year because of a slow variation in the rotation of the earth, caused by the gravitational pull of the sun and moon.