See Also: instantaneous(medicine)
instantaneous(dictionary)
instantaneous(dictionary)
instantaneous rate(medicine)
instantaneous vector(medicine)
instantaneous electrical axis(medicine)

instantaneous (iou)



instantaneous adjective. M17.
[from medieval Latin instantaneus, from Latin instant- (see INSTANT adjective & adverb) after medieval Latin momentaneus: see -ANEOUS.]
Occurring or done within an instant or instantly. M17.
W. Golding The applause was instantaneous and overwhelming.
b. Photography (now chiefly Hist.). Of, pertaining to, or designating an exposure of brief duration controlled by a rapid shutter mechanism (in contrast to a time exposure). M19.
Math. & Physics. Of a variable value, axis of rotation, etc.: existing at or pertaining to a particular instant. E19.
instanta'neity noun the quality of being instantaneous M18.
instantaneously adverb M17.
instantaneousness noun E18.