sextene--prophetes.ai

▪ I. sextene Chem.
    (sɛkˈstiːn)
    [f. L. sext-us sixth + -ene.]
    = hexene.

1873 Watts Fownes' Chem. (ed. 11) 554.

▪ II. sextene
obs. form of sixteen.

Oxford English Dictionary