PERTHITE
Perth"ite, n. Etym: [So called from Perth, in canada.] (Min.)
Defn: A kind of feldspar consisting of a laminated intertexture of albite and orthoclase, usually of different colors. — Per*thit"ic, a.
PERTINACIOUS
Per`ti*na"cious, a.Etym: [L. pertinax, -acis; per + tenax tenacious.
See Per-, and Tenacious.]
1. Holding or adhering to any opinion, purpose, or design, with obstinacy; perversely persistent; obstinate; as, pertinacious plotters; a pertinacious beggar.
2. Resolute; persevering; constant; steady. Diligence is a steady, constant, and pertinacious study. South.
Syn.
— Obstinate; stubborn; inflexible; unyielding; resolute;
determined; firm; constant; steady.
— Per`ti*na"cious*ly, adv.
— Per`ti*na"cious*ness, n.
PERTINACITY
Per`ti*nac"i*ty, n. Etym: [Cf. F. pertinacité.]
Defn: The quality or state of being pertinacious; obstinacy; perseverance; persistency. Macaulay.
Syn.
— See Obstinacy.
PERTINACY
Per"ti*na*cy, n. Etym: [L. pertinere to pertain. See Pertinence.]