pneumon-

From Ancient Greek πνευμον- (pneumon-), the stem of πνεύμων (pneúmōn), a variant of πλεύμων (pleúmōn, “lung”); compare the German pneumono-.

• (Received Pronunciation) enPR: nyo͞omŏn, nyo͞omən, IPA^(key): /njuːmɒn/, /njuːmən/

pneumon-

1. lung

• When combined with a word or another affix which begins with a consonant, this prefix concatenates with -o- (as pneumono-).
• This prefix is sometimes abbreviated to pneum-.

• “Pneumono-” listed on pages 1,033–1,034 of volume 7 (O–P) of A New English Dictionary on Historical Principles [1st Ed.; 1909]
    Pneumono- (pniūmono, niū-), before a vowel pneumon-, combining form of Gr. πνεύμων, πνεύμον- lung. (Often contracted to Pneumo-.)
• “pneumono-” listed in the Oxford English Dictionary [2nd Ed.; 1989]
    /pnjuːməʊnəʊ, njuː-/
• “pneumono-, comb. form” listed in the Oxford English Dictionary [draft revision; Dec. 2009]
    < ancient Greek πνεύμον-, πνεύμων, variant […] of πλεύμων lung