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Definition of semi-infinite
1
: extending to infinity in one direction or dimension
the propagation of a temperature wave along a semi-infinite rod
2
: limited only by an infinite plane
a semi-infinite metal with a constant flux of heat into its surface— M. L. Storm
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“Semi-infinite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semi-infinite. Accessed 26 Jan. 2022.
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