ability to live, especially under certain conditions: The viability of a fetus outside the womb has increased dramatically with the advent of new technologies and procedures. 2. the capacity to operate or be sustained: The viability of the company was guaranteed by the success of its new product. Related forms.
Hypervelocity is very high velocity, approximately over 3,000 meters per second (6,700 mph, 11,000 km/h, 10,000 ft/s, or Mach 8.8). In particular, hypervelocity is velocity so high that the strength of materials upon impact is very small compared to inertial stresses. Thus, even metals behave like fluids under hypervelocity
spasticity. [spastisâ²itÄ]. Etymology: Gk, spastikos, drawing in. a form of muscular hypertonicity with increased resistance to stretch. It usually involves the flexors of the arms and the extensors of the legs.The hypertonicity is often associated with weakness, increased deep reflexes, and diminished superficial reflexes. Moderate spasticity is characterized by movements that require great effort and lack of normal coordination.Slight spasticity may be marked by gross movements that are coordinated smoothly but combine selective movement patterns that are incoordinated or impossible.ne type of increase in muscle tone at rest; characterized by increased resistance to passive stretch, velocity dependent and asymmetric about joints (that is, greater in the flexor muscles at the elbow and the extensor muscles at the knee).