Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun startle_reflex

1 sense of startle reflex

Sense 1
startle reflex, Moro reflex -- (a normal reflex of young infants; a sudden loud noise causes the child to stretch out the arms and flex the legs)
       => startle, jump, start -- (a sudden involuntary movement; "he awoke with a start")