Third-person singular simple present indicative form of subtend.(verb)
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Use "subtends" in a sentence
"My blood makes air and cells; my moon subtends the sky; my tides squeeze life out of rock."
"A 72-inch screen seen from 10 feet a nominal couch-to-TV distance subtends a diagonal angle of 33 degrees, which happens to be about the same as watching a 50-foot movie screen from a seat in the middle of the theater."
"Shuffling is one example of something seemingly ordinary that subtends an elegant mathematical structure."