Word: upsweep
Part of speech: Noun
Syllables: up
sweep
Definition: The unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays, consisting of a long train of narrow-band upsweeping sounds of several seconds in duration.
Morphemes:
Affix: up-
Language: en
PoS: Prefix
Meaning: Used to indicate higher position or direction, literally or figuratively.
Affix: sweep
Language: en
PoS: Noun
Meaning: An expanse or a swath, a strip of land.