• Japanese: 周期的 (shūki-teki)

• Japanese: 周期的 (shūki-teki)

• ttbc Spanish: periódico m, periódica f

Etymology 2

From per- + iodic

Adjective

periodic

1. Of or derived from a periodic acid.

Derived terms

• periodate
• periodic acid

Period or periodic may refer to:

Language and literature

• Full stop, a punctuation mark indicating the end of a sentence or phrase
• Periodic sentence (rhetoric), a sentence that is not grammatically complete until its end
• The final book in Dennis Cooper's George Miles cycle of novels

Science and mathematics

• Menstruation, a phase of the menstrual cycle in which the uterine lining is shed
• Orbital period, a concept in astronomy
• Period (gene), a gene in Drosophila involved in regulating circadian rhythm
• Period (geology), a subdivision of geologic time
• Period (number), a concept in mathematics
• Period (periodic table), a horizontal row of the periodic table
• Period (physics), the inverse of frequency (a division of time)
• Periodic acid, an oxoacid of iodine

Other meanings

• Period (music), a concept in musical composition
• Periodicity, the quality of occurring at regular intervals
• Historical period, a way to categorize stretches of time

See also

• Periodization

alternate, articulated, beating, catenated, ceaseless, circling, concatenated, connected, constant, continual, continued, continuing, continuous, cyclic, cyclical, direct, editorial, endless, episodic, epochal, even, ever-recurring, every other, featureless, fluctuant, fluctuating, fluctuational, frequent, gapless, harmonic, haunting, immediate, incessant, interminable, intermittent, isochronal, isochronous, iterative, joined, jointless, journalese, journalistic, libratory, linked, magazinish, magaziny, measured, metronomic, monotonous, never-ending, newspaperish, newspapery, nonstop, nutational, occasional, on-again-off-again, oscillating, oscillatory, pendular, pendulous, perennial, periodical, pulsing, reappearing, reciprocal, recurrent, recurring, regular, repeated, repetitive, reportorial, resonant, returning, revenant, rhythmic, rotary, round-the-clock, running, seamless, seasonal, serial, serried, smooth, sporadic, stable, steady, straight, thematic, thick-coming, twenty-four-hour, ubiquitous, unbroken, unceasing, undifferentiated, undulant, undulatory, unending, uniform, unintermitted, unintermittent, unintermitting, uninterrupted, unrelieved, unremitting, unstopped, vacillating, vacillatory, vibratile, vibrating, vibratory, wavelike, wavering, wheeling