message unit
noun
a measure of the duration of and distance covered by local telephone calls, used by telephone companies as a basis for assessing service charges.
Nearby words
message, message board, message center, message stick, message switching, message unit, messager, messaging, messalian, messalina, messaline
Origin of message unit
First recorded in 1960–65
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019