service module

noun

: a space vehicle module that contains oxygen, water, fuel cells, propellant tanks, and the main rocket engine

Examples of service module in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Instead, Orion and its service module were pictured burning under the power of what appears to be a Centaur V — the upper stage for United Launch Alliance's (ULA) new Vulcan rocket. Josh Dinner, Space.com, 10 Mar. 2026 Interestingly, this series of tests aligns Artemis III more closely with the historical role of Apollo 7, which focused on evaluating the command and service module in Earth orbit. Marcos Fernandez Tous, The Conversation, 4 Mar. 2026 Some early reports indicated that the fire started in the service module and then spread to the command module. Orlando Sentinel Staff, The Orlando Sentinel, 26 Jan. 2026 The service module will burn up in the atmosphere. Matthew Glasser, ABC News, 20 Jan. 2026 See All Example Sentences for service module

Word History

First Known Use

1961, in the meaning defined above

Time Traveler
The first known use of service module was in 1961

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Cite this Entry

“Service module.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/service%20module. Accessed 30 Mar. 2026.

Kids Definition

service module

noun
: a part of a space vehicle containing oxygen, water, fuel cells, fuel tanks, and the main rocket engine
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