absolute retardation

achromatic phase retardation

and retardation measure

brake retardation rate

colour retardation

combustion retardation

Complex thermal retardation

compound flame retardation

crack growth retardation

Deceleration retardation

developmental language retardation

developmental retardation of speech

distribution of retardation times

evolutionary retardation

excessive anxiety to retardation of Qi

Extrauterine growth retardation

Family history of mental retardation

Fatal growth retardation

Fetal growth retardation

Fetal intrauterine growth retardation