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.)
- Periodic tenancy
noun 1. (social welfare) the letting of a dwelling for a repeated short term, as by the week, month, or quarter, with no end date
[puh-rahy-uh-dahyd, -did] /pəˈraɪ əˌdaɪd, -dɪd/ noun, Chemistry. 1. an iodide with the maximum proportion of iodine.
[peer-ee-uh-duh-zey-shuh n] /ˌpɪər i ə dəˈzeɪ ʃən/ noun 1. an act or instance of dividing a subject into historical eras for purposes of analysis and study. /ˌpɪərɪədaɪˈzeɪʃən/ noun 1. the act or process of dividing history into periods noun the division and categorization of history into periods of time for the purposes of discussion and […]
- Period-luminosity relation
[peer-ee-uh d-loo-muh-nos-i-tee] /ˈpɪər i ədˌlu məˈnɒs ɪ ti/ noun, Astronomy. 1. the relationship between the period of light variation and of the absolute magnitude of Cepheid variable stars.
[per-ee-uh-don-tl] /ˌpɛr i əˈdɒn tl/ adjective, Dentistry. 1. of or relating to the periodontium. 2. of or relating to . 3. of or relating to the . /ˌpɛrɪəˈdɒntəl/ adjective 1. of, denoting, or affecting the gums and other tissues surrounding the teeth: periodontal disease adj. 1848, literally “around the tooth,” from peri- + Greek odon […]