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pulsar
noun , astron in space: a source of electromagnetic radiation emitted in brief regular pulses, mainly at radio frequency, believed to be a rapidly revolving neutron star.
[1960s: from puls ating star , modelled on quasar]
noun , astron in space: a source of electromagnetic radiation emitted in brief regular pulses, mainly at radio frequency, believed to be a rapidly revolving neutron star.
[1960s: from puls ating star , modelled on quasar]
pulsate
verb (pulsated , pulsating ) intr
1 to beat or throb.
2 to contract and expand rhythmically.
3 to vibrate.
[18c: from Latin pulsare , pulsatum to beat]
pulsation noun .
verb (pulsated , pulsating ) intr
1 to beat or throb.
2 to contract and expand rhythmically.
3 to vibrate.
[18c: from Latin pulsare , pulsatum to beat]
pulsation noun .
pulse1
noun
1 physiol the rhythmic beat that can be detected in an artery, corresponding to the regular contraction of the left ventricle of the heart as it pumps blood around the body.
2 med , etc the rate of this beat, often measured as an indicator of a person's state of health.
3 a regular throbbing beat in music.
4 physics a signal, eg one of light or electric current, of very short duration.
5 the hum or bustle of a busy place.
6 a thrill of excitement, etc.
7 the attitude or feelings of a group or community at any one time.
verb (pulsed , pulsing )
1 intr to throb or pulsate.
2 to drive something by pulses.
[14c: from French pous , from Latin pulsus a beating, from pellere , pulsum to beat]
noun
1 physiol the rhythmic beat that can be detected in an artery, corresponding to the regular contraction of the left ventricle of the heart as it pumps blood around the body.
2 med , etc the rate of this beat, often measured as an indicator of a person's state of health.
3 a regular throbbing beat in music.
4 physics a signal, eg one of light or electric current, of very short duration.
5 the hum or bustle of a busy place.
6 a thrill of excitement, etc.
7 the attitude or feelings of a group or community at any one time.
verb (pulsed , pulsing )
1 intr to throb or pulsate.
2 to drive something by pulses.
[14c: from French pous , from Latin pulsus a beating, from pellere , pulsum to beat]
pulse2
noun
1 the edible dried seed of a plant belonging to the pea family, eg pea, bean, lentil, etc.
2 any plant that bears this seed.
[13c: from French pols , from Latin puls meal porridge or bean pottage]
noun
1 the edible dried seed of a plant belonging to the pea family, eg pea, bean, lentil, etc.
2 any plant that bears this seed.
[13c: from French pols , from Latin puls meal porridge or bean pottage]
pulse code modulation
noun , telecomm a method of transmission in which the audio signals are sampled periodically, coded in digital form, and transmitted.
noun , telecomm a method of transmission in which the audio signals are sampled periodically, coded in digital form, and transmitted.
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