| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024pe•ri•od•ic1 /ˌpɪriˈɑdɪk/USA pronunciation adj. - occurring again at regular periods of time:periodic outbreaks of smallpox.
pe•ri•od•i•cal•ly, adv.: She'd come into my office periodically to complain. pe•ri•o•dic•i•ty /ˌpɪriəˈdɪsɪti/USA pronunciation n. [uncountable] WordReference Random House Unabridged Dictionary of American English © 2024pe•ri•od•ic1 (pēr′ē od′ik),USA pronunciation adj. - recurring at intervals of time:periodic revivals of an interest in handicrafts.
- occurring or appearing at regular intervals:periodic visits of a mail steamer to an island.
- repeated at irregular intervals;
intermittent:periodic outbreaks of the disease. - Physicsrecurring at equal intervals of time.
- Mathematics(of a function) having a graph that repeats after a fixed interval (period) of the independent variable.
- Astronomy
- characterized by a series of successive circuits or revolutions, as the motion of a planet or satellite.
- of or pertaining to a period, as of the revolution of a heavenly body.
- Poetrypertaining to or characterized by rhetorical periods, or periodic sentences.
- Greek periodikós. See period, -ic
- Latin periodicus
- 1635–45
- Chemistryof or derived from a periodic acid.
Collins Concise English Dictionary © HarperCollins Publishers:: periodic /ˌpɪərɪˈɒdɪk/ adj - happening or recurring at intervals; intermittent
- of, relating to, or resembling a period
- having or occurring in repeated periods or cycles
ˌperiˈodically adv periodicity /ˌpɪərɪəˈdɪsɪtɪ/ n |