Back float
a floating position on one’s back with arms extended out to the sides and face upward.
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- Backflow
a flow of a liquid opposite to the usual or desired direction.
- Backflow valve
backwater valve. a valve for preventing flowing liquid, as sewage, from reversing its direction.
- Back focus
the distance between the back surface of a lens and the focal plane when the lens is focused at infinity.
- Back foot
noun on the back foot, at a disadvantage; outmanoeuvred or outcl-ssed by an opponent contemporary examples government forces, he says, are constantly on the back foot, rarely launching offensives to regain territory. iraqis swear: baghdad airport is safe from isis susannah george october 12, 2014 historical examples he pulled at his back foot like a […]
- Back formation
the -n-logical creation of one word from another word that appears to be a derived or inflected form of the first by dropping the apparent affix or by modification. a word so formed, as typewrite from typewriter. historical examples in any event, the men should be taught to take some form of a closed back […]