[peer-ee-uh-dis-i-tee] /ˌpɪər i əˈdɪs ɪ ti/
the character of being ; the tendency to recur at regular intervals.
1805, from French périodicité (1796), from périodique, from Latin periodicus (see periodic).
periodicity pe·ri·o·dic·i·ty (pĭr’ē-ə-dĭs’ĭ-tē)
[peer-ee-od-ik, peer-] /ˈpɪər iˈɒd ɪk, ˌpɪər-/ noun, Chemistry. 1. the law that the properties of the elements are periodic functions of their atomic numbers. 2. Also called Mendeleev’s law. (originally) the statement that the chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic weights. […]
[peer-ee-od-ik, peer-] /ˈpɪər iˈɒd ɪk, ˌpɪər-/ noun, Physics. 1. any motion that recurs in identical forms at equal intervals of time. periodic motion See harmonic motion.
- Periodic neutropenia
periodic neutropenia n. Neutropenia recurring at regular intervals, associated with various types of infectious diseases. Also called cyclic neutropenia.
- Periodic paralysis
periodic paralysis n. A group of diseases marked by episodes of muscular weakness or flaccid paralysis without loss of consciousness, speech, or sensation.