Medical Dictionary
all–or–none
adj \ˌȯ-lər-ˈnən\
Medical Definition of ALL-OR-NONE
: marked either by complete operation or effect or by none at all <all–or–none response of a nerve cell>
Seen & Heard
What made you want to look up all-or-none? Please tell us where you read or heard it (including the quote, if possible).