Perthite



[pur-thahyt] /ˈpɜr θaɪt/

noun, Mineralogy.
1.
a variety of feldspar containing irregular bands of albite in microcline.

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  • Perthshire

    [purth-sheer, -sher] /ˈpɜrθ ʃɪər, -ʃər/ noun 1. (def 1). /ˈpɜːθˌʃɪə; -ʃə/ noun 1. (until 1975) a county of central Scotland, now part of Perth and Kinross council area

  • Pertinacious

    [pur-tn-ey-shuh s] /ˌpɜr tnˈeɪ ʃəs/ adjective 1. holding tenaciously to a purpose, course of action, or opinion; resolute. 2. stubborn or obstinate. 3. extremely or objectionably persistent: a pertinacious salesman from whom I could not escape. /ˌpɜːtɪˈneɪʃəs/ adjective 1. doggedly resolute in purpose or belief; unyielding 2. stubbornly persistent adj. 1620s, from pertinacy (late 14c.; […]



  • Pertinaciously

    [pur-tn-ey-shuh s] /ˌpɜr tnˈeɪ ʃəs/ adjective 1. holding tenaciously to a purpose, course of action, or opinion; resolute. 2. stubborn or obstinate. 3. extremely or objectionably persistent: a pertinacious salesman from whom I could not escape. /ˌpɜːtɪˈneɪʃəs/ adjective 1. doggedly resolute in purpose or belief; unyielding 2. stubbornly persistent adj. 1620s, from pertinacy (late 14c.; […]

  • Pertinacity

    [pur-tn-as-i-tee] /ˌpɜr tnˈæs ɪ ti/ noun 1. the quality of being ; persistence. n. c.1500, from Middle French pertinacité (early 15c.), from Old French pertinace “obstinate, stubborn,” from Latin pertinacem (nominative pertinax) “very firm, tenacious, steadfast, persevering,” from per- “very” (see per) + tenax (see tenacious). It drove out earlier pertinacy (late 14c.).



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