periodic paralysis n.
A group of diseases marked by episodes of muscular weakness or flaccid paralysis without loss of consciousness, speech, or sensation.
[peer-ee-od-ik, peer-] /ˈpɪər iˈɒd ɪk, ˌpɪər-/ noun 1. a sentence that, by leaving the completion of its main clause to the end, produces an effect of suspense, as in Unable to join the others at the dance because of my sprained ankle, I went to a movie. /ˌpɪərɪˈɒdɪk/ noun 1. (rhetoric) a sentence in which […]
[peer-ee-od-ik, peer-] /ˈpɪər iˈɒd ɪk, ˌpɪər-/ noun, Chemistry. 1. a system of classification of the elements based on the periodic law. /ˌpɪərɪˈɒdɪk/ noun 1. the classification of the elements based on the periodic law
[peer-ee-od-ik, peer-] /ˈpɪər iˈɒd ɪk, ˌpɪər-/ noun, Chemistry. 1. a table illustrating the periodic system, in which the chemical elements, formerly arranged in the order of their atomic weights and now according to their atomic numbers, are shown in related groups. /ˌpɪərɪˈɒdɪk/ noun 1. a table of the elements, arranged in order of increasing atomic […]
- Periodic table of the elements
A chart of the chemical elements that displays them in rows horizontally in order of increasing atomic number and vertically according to similarity of the chemical properties of their atoms. The position of an element on the table thus gives useful information about the structure and chemical properties of the element. (See Dimitri Mendeleev.)