Period - Science and Mathematics

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
• Periodic function and periodical, a function that repeats its values in regular intervals
  • The period of a periodic function
• Periodic group in group theory
• Periods (ring) — the ring of numbers which can be expressed as integrals of algebraic differential forms over algebraically defined domains
• Pisano period
• Periodic table, a chart which lists all currently known chemical elements

• Period (periodic table), a horizontal row of the periodic table

• Periodic acid, an oxoacid of iodine
• Period (physics), the time taken for one full oscillation; it is the reciprocal of frequency
• Period of orbit
• Period of time