(law) An aggregate of people, legal entity, or body corporate who have (some of) the legal rights and responsibilities of a natural person under the law.

(idiomatic) A person who wakes up, without difficulty, early each morning and is alert and active during the first part of the day.

(idiomatic) A person whose preference or custom is to remain awake and active during the evening and early morning (night) hours, and who usually sleeps during part of the daytime.

(baseball) The frequency with which a hitter successfully reaches first base.

plural of peregrine falcon

(mathematical analysis) A set which is equal to its set of limit points. That is, a set A is perfect if A'=A.

(epidemiology) The time elapsed between an exposure to a pathogenic organism, a chemical or radiation, and the appearance of signs and symptoms.

plural of perfect gold standard test

Having the quality of performing exceptionally well.

An event of a woman's discharging of menstrual flow of blood and cells.