combining form of Greek σίϕων before vowels (cf. siphono-comb. form), occurring in a few terms of Zoology and Botany, of doubtful currency in English, as siphonanth, siphonanthous, siphonapter, siphonapterous. See also siphonapteranadj.
ΚΠ
1858 R. G. MayneExpos. Lexicon Med. Sci. (1860) (Siphonanthous, Siphonapterous).
1895 I. K. Funk et al. Standard Dict. Eng. Lang. II.