Written beneath: as, the Greek iota (ι) subscript, so written since the twelfth century in the improper diphthongs ᾳ (α%26ι), ῃ (ηι), ῳ (ωι): opposed to adscript (as in Ἀι, Ἠι, Ὠι). This ι had become mute by about 200 b. c., and was sometimes written (adscript), sometimes omitted.n. Something written beneath.