perpetual motion |
the movement of a hypothetical device which, once put in motion, would operate indefinitely by creating its own energy in excess of that expended. |
perpetuate |
to cause to last or be remembered. |
perpetuity |
the state or quality of being perpetual. [4 definitions] |
perplex |
to puzzle, confuse, or cause uncertainty in the mind of (a person). [2 definitions] |
perplexed |
puzzled, confused, or uncertain. [2 definitions] |
perplexing |
causing difficulty in understanding or in figuring out a solution or a way to proceed. |
perplexity |
the condition of being puzzled, confused, or uncertain. [3 definitions] |
perquisite |
a payment or benefit in addition to the wages or salary associated with a position. [2 definitions] |
pers. |
abbreviation of "person." |
per se |
(Latin) in or by itself or themselves; intrinsically. |
per second per second |
a unit that expresses the rate of change of a rate of change, such as acceleration, which is the rate of change of velocity. |
persecute |
to subject (esp. those belonging to a different political, religious, or racial group) to persistent harassment, punishment, or ill-treatment. [2 definitions] |
persecution |
the act of persecuting, or the condition or fact of being persecuted. [2 definitions] |
Perseid |
any of numerous meteors visible in the night sky around mid-August each year. |
Persephone |
in Greek mythology, the daughter of Demeter and Zeus, carried off by Hades to the underworld and thereafter permitted to spend only half the year back in the world. The myth presents this cycle of loss and return as the origin of the seasons. |
Perseus |
in Greek mythology, the son of Zeus and Danae, who slew Medusa and used her head with its fatal stare to save Andromeda from the sea monster Cetus. [2 definitions] |
perseverance |
steadfast continuance in a course of action, task, or belief. |
perseverate |
to manifest or experience perseveration. [2 definitions] |
perseveration |
the pathological continuation or repetition of an action, gesture, or expression, such as a word or phrase. [2 definitions] |
persevere |
to continue steadfastly in a task or course of action or hold steadfastly to a belief or commitment, esp. when met with opposition or difficulties; persist. |
persevering |
steadfast in following a course of action or holding a belief; tenacious; persistent. |