HyperDic: startle_reflex

English > 1 sense of the expression startle reflex:
NOUNactstartle reflex, Moro reflexa normal reflex of young infants
English > startle reflex: 1 sense > noun 1, act
MeaningA normal reflex of young infants; a sudden loud noise causes the child to stretch out the arms and flex the legs.
SynonymMoro reflex
Broaderstartle, jump, startA sudden involuntary movement

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