underportion

English

Etymology

From under- +‎ portion.

Pronunciation

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Noun

underportion (plural underportions)

1. The lower portion of something; the underneath.
   • 1962 October, “Talking of trains: New signalbox at Twyford”, in Modern Railways, page 226:

     New relay rooms have been provided at Maidenhead West, Twyford and Reading Main Line East signalboxes; in the latter case an underportion of the building was reconstructed to provide additional rooms for the relay equipment and a diesel standby generator.