[ see-lev-uh l ]
/ ˈsiˌlɛv əl /
the atmospheric pressure, at any elevation, reduced by formula to a value approximating the pressure at sea level.
APAPRead more in this article about some frequently asked questions and fun facts related to our definitions.
Hyper vs. HypoLet’s start from the top: Hyper- is a prefix that means excess or exaggeration, while hypo- is another prefix that means under or beneath. Both hyper and hypo are usually used as prefixes, which are elements or partial words added to the beginning of a base word to modify its meaning. Hyper is derived from the Greek word for over, and hypo is a Greek …
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019