hyperaccurate en · ADJ
Etymology
From hyper- + accurate.
Meanings
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(not-comparable) Almost perfectly accurate.
Moskowitz and Devereux have designed a hyperaccurate sextant for interstellar navigation based upon the design of the sextant used by the Apollo astronauts.
1981, Saul Adelman, Benjamin Adelman, Bound for the Stars, →ISBN, page 227: