n.
Pronunciation: ' ī -s ə - ˌ krän
Variant: or iso · chrone \ - ˌ kr ō n \
Function: noun
Etymology: International Scientific Vocabulary is- + -chron (fr. Greek chronos time)
Date: 1881
: an imaginary line or a line on a chart connecting points at which an event occurs simultaneously or which represents the same time or time difference