See Also: backlash(medicine)
backlash(dictionary)
backlash(dictionary)

proavis (iou) and backlash (medicine)


proavis (iou)



proavis noun. . E20.
[from PRO-2 + Latin avis bird.]
Palaeontology. A hypothetical animal forming an evolutionary link between fossil reptiles and fossil birds.
proavian adjective & noun E20.

backlash (medicine)


backlash
<mechanics> The distance through which one part of connected machinery, as a wheel, piston, or screw, can be moved without moving the connected parts, resulting from looseness in fitting or from wear; also, the jarring or reflex motion caused in badly fitting machinery by irregularities in velocity or a reverse of motion.

Origin: Back, adv. + lash.

Source: Websters Dictionary