retardation

nouns

a decrease in rate of change
"the deceleration of the arms race"
is derived from
is derived from
the extent to which something is delayed or held back
is derived from
is a type of (narrower)
time during which some action is awaited
"instant replay caused too long a delay"; "he ordered a hold in the action"
any agent that retards or delays or hinders
"flame-retardant"
is derived from
lack of normal development of intellectual capacities
is derived from
the act of slowing down or falling behind
is derived from
is derived from