Retardation /(?)/

Re·tar·da·tion

Retardation

n.
  1. The act of retarding; hindrance; the act of delaying; as, the retardation of the motion of a ship; -- opposed to acceleration.
    The retardations of our fluent motion.
    — De Quinsey.
  2. That which retards; an obstacle; an obstruction.
    Hills, sloughs, and other terrestrial retardations.
  3. The keeping back of an approaching consonant chord by prolonging one or more tones of a previous chord into the intermediate chord which follows; -- differing from suspension by resolving upwards instead of downwards. (Mus.)
  4. The extent to which anything is retarded; the amount of retarding or delay.

Phrases & Compounds
Retardation of the tide
The lunitidal interval, or the hour angle of the moon at the time of high tide any port; the interval between the transit of the moon and the time of high tide next following