dextr-

1.
variant of dextro- before a vowel:
dextral.
British Dictionary definitions for dextr-

dextro-

combining form
1.
on or towards the right: dextrorotation
2.
(in chemistry) indicating a dextrorotatory compound: dextroglucose
Word Origin
from Latin, from dexter on the right side
dextr- in Medicine

dextr- pref.
Variant of dextro-.