transmittal (n.)

"send over, onward, or along," c. 1400, from Latin transmittere "send across, cause to go across, transfer, pass on," from trans "across, beyond" (see trans-) + mittere "to release, let go; send, throw" (see mission). Related: Transmitted; transmitting.

suffix forming nouns of action from verbs, mostly from Latin and French, meaning "act of ______ing" (such as survival, referral), Middle English -aille, from French feminine singular -aille, from Latin -alia, neuter plural of adjective suffix -alis, also used in English as a noun suffix. Nativized in English and used with Germanic verbs (as in bestowal, betrothal).