service module

noun
  1. (often initial capital letters) U.S. Aerospace. the section of an Apollo spacecraft containing the principal propulsion system, electrical system, water, and other supplies.

Origin of service module

First recorded in 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for service module

service module

noun
  1. a section of an Apollo spacecraft housing the rocket engine, radar, fuel cells, etc, and jettisoned on re-entry into the earth's atmosphereSee also lunar module, command module
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012