pion, pi-meson
(noun) a meson involved in holding the nucleus together; produced as the result of high-energy particle collision
Source: WordNet® 3.1
pion (plural pions)
(particle) Any of three semistable mesons, having positive, negative or neutral charge, composed of up and down quarks/antiquarks.
• pi meson
• INOP, Pino
Source: Wiktionary
PiƱ"on, n. [Sp. piƱon.] (Bot.) (a) The edible seed of several species of pine; also, the tree producing such seeds, as Pinus Pinea of Southern Europe, and P. Parryana, cembroides, edulis, and monophylla, the nut pines of Western North America. (b) See Monkey's puzzle. [Written also pignon.]
Source: Webster’s Unabridged Dictionary 1913 Edition
29 May 2025
(adjective) characterized by careful evaluation and judgment; āa critical readingā; āa critical dissertationā; āa critical analysis of Melvilleās writingsā
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