semiologist|siːmɪˈɒlədʒɪst, sɛmɪ-| Also semeiologist|siːmaɪ-|. [f. next + -ist.] One skilled in sign-language. 1848Lowell Biglow P.Ser. i. ii. Comment., Yet must he be a semeiologist the most expert, making himself intelligible to every people and kindred by signs.