Search Result for "all-or-none law":
Wordnet 3.0

NOUN (1)

1. (neurophysiology) a nerve impulse resulting from a weak stimulus is just as strong as a nerve impulse resulting from a strong stimulus; 



WordNet (r) 3.0 (2006):

all-or-none law
    n 1: (neurophysiology) a nerve impulse resulting from a weak
         stimulus is just as strong as a nerve impulse resulting
         from a strong stimulus