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rye, in botany

(Encyclopedia)rye, cereal grain of the family Poaceae (grass family). The grain, Secale cereale, is important chiefly in Central and N Europe. It seems to have been domesticated later than wheat and other staple gr...

phase, in astronomy

(Encyclopedia)CE5 Phases of the moon phase, in astronomy, the measure of how much of the illuminated surface of a planet or satellite can be seen from a point at a distance from that body; the term is most ofte...

phase, in physics

(Encyclopedia)phase, in physics: see wave.

Phoebe, in astronomy

(Encyclopedia)Phoebe fēˈbē [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn IX (or S9), Phoebe is 137 mi (220 km) in diameter, orbits Saturn at a mean distance ...

phoebe, in zoology

(Encyclopedia)phoebe, in zoology: see flycatcher. ...

phoenix, in mythology

(Encyclopedia)phoenix, fabulous bird that periodically regenerated itself, used in literature as a symbol of death and resurrection. According to legend, the phoenix lived in Arabia; when it reached the end of its ...

Proconsul, in zoology

(Encyclopedia)Proconsul, extinct group of apes. Proconsul fossils have been discovered in E Africa. It had a mixture of ape and Old World monkey characteristics, and lived from 23 to 25 million years ago. ...

Prometheus, in astronomy

(Encyclopedia)Prometheus prōmēˈthēəs [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn XVI (or S16), Prometheus is an irregularly shaped (nonspherical) body me...

saint, in Christianity

(Encyclopedia)saint [O.Fr., from Latin sanctus=holy], in Christianity, a person who is recognized as worthy of veneration. Accounts of saints' lives have been favorite reading material for many, and at times thei...

root, in botany

(Encyclopedia)CE5 Longitudinal cross section of a root root, in botany, the descending axis of a plant, as contrasted with the stem, the ascending axis. In most plants the root is underground, but in epiphytes ...