counterpressure filling
1wind instrument — /wind/ a musical instrument sounded by the breath or other air current, as the trumpet, trombone, clarinet, or flute. [1575 85] * * * ▪ music Introduction any musical instrument that uses air as the primary vibrating medium for the… …
2Spacesuits in fiction — Science fiction authors have designed imaginary spacesuits for their characters almost since the beginning of fiction set in space.Often, comic book creators seem unaware of the effects of internal pressure which tends to inflate a spacesuit in… …
3human evolution — Evolution of modern human beings from nonhuman and extinct hominid forms. Genetic evidence points to an evolutionary divergence between the lineages of humans and the great apes (Pongidae) on the African continent 5–8 million years ago. The… …
