a change in the relative numbers of the different groups of individuals making up a population
pyrolysis
Noun
transformation of a substance produced by the action of heat
power outage
Noun
equipment failure resulting when the supply of power fails
power failure
Noun
equipment failure resulting when the supply of power fails
paradiddle
Noun
the sound of a drum, especially a snare drum, beaten rapidly and continuously
peal
Noun
a deep prolonged sound (as of thunder or large bells)
peal
Verb
sound loudly and sonorously
peal
Verb
ring recurrently
pealing
Noun
a deep prolonged sound (as of thunder or large bells)
ping
Noun
a sharp high-pitched resonant sound (as of a sonar echo or a bullet striking metal)
ping
Verb
send a message from one computer to another to check whether it is reachable and active
ping
Verb
contact, usually in order to remind of something
ping
Verb
hit with a pinging noise
ping
Verb
make a short high-pitched sound
ping
Verb
sound like a car engine that is firing too early
point mutation
Noun
(genetics) a mutation due to an intramolecular reorganization of a gene
plonk
Noun
the noise of something dropping (as into liquid)
plonk
Noun
a cheap wine of inferior quality
plonk
Verb
set (something or oneself) down with or as if with a noise
popping
Noun
a sharp explosive sound as from a gunshot or drawing a cork
purr
Noun
a low vibrating sound typical of a contented cat
purr
Verb
indicate pleasure by purring
purr
Verb
make a soft swishing sound
pulse
Noun
the rhythmic contraction and expansion of the arteries with each beat of the heart
pulse
Noun
(electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
pulse
Noun
edible seeds of various pod-bearing plants (peas or beans or lentils etc.)
pulse
Noun
the rate at which the heart beats
pulse
Verb
produce or modulate (as electromagnetic waves) in the form of short bursts or pulses or cause an apparatus to produce pulses
pulse
Verb
expand and contract rhythmically
pulse
Verb
drive by or as if by pulsation
pulsation
Noun
the rhythmic contraction and expansion of the arteries with each beat of the heart
pulsation
Noun
(electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
pulsation
Noun
a periodically recurring phenomenon that alternately increases and decreases some quantity
plash
Noun
the sound like water splashing
plash
Verb
dash a liquid upon or against
plash
Verb
interlace the shoots of
pulsing
Noun
(electronics) a sharp transient wave in the normal electrical state (or a series of such transients)
pollination
Noun
transfer of pollen from the anther to the stigma of a plant
pollenation
Noun
transfer of pollen from the anther to the stigma of a plant
potlatch
Noun
a ceremonial feast held by some Indians of the northwestern coast of North America (as in celebrating a marriage or a new accession) in which the host gives gifts to tribesmen and others to display his superior wealth (sometimes, formerly, to his own impoverishment)
photo opportunity
Noun
an occasion that lends itself to, or is deliberately arranged for, taking photographs that provide favorable publicity for those who are photographed
photo op
Noun
an occasion that lends itself to (or is deliberately arranged for) taking photographs that provide favorable publicity for those who are photographed
pole vault
Noun
a competition that involves jumping over a high crossbar with the aid of a long pole
pole vaulting
Noun
a competition that involves jumping over a high crossbar with the aid of a long pole
pole jump
Noun
a competition that involves jumping over a high crossbar with the aid of a long pole
pole jumping
Noun
a competition that involves jumping over a high crossbar with the aid of a long pole
pentathlon
Noun
an athletic contest consisting of five different events
prizefight
Noun
a boxing match between professional boxers for a cash prize