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- noun chemistry Any
elementfrom group 15 of the periodic table; nitrogen, phosphorus, arsenic, antimonyand bismuth.
from Wiktionary, Creative Commons Attribution/Share-Alike License
From Ancient Greek πνίγειν (pnigein, "to choke, to stifle") (a property of nitrogen) + -gen, with -t- in some forms, perhaps by analogy with pnictide.
The terms pnictogen and chalcogen are dear to my heart, yet they are just pretentious ways of saying nitrogen family and oxygen family.