is-
1.
variant of
iso-
before a vowel:
isallobar.
British Dictionary definitions for
is-
is-
combining form
1.
variant of
iso-
isentropic
iso-
combining form
1.
equal or identical:
isomagnetic
2.
indicating that a chemical compound is an isomer of a specified compound:
isobutane,
isocyanic acid
Word Origin
from Greek
isos
equal
is-
in Medicine
is-
pref.
Variant of
iso-
.