gal.1 
abbreviation
Gallon(s).
Gal.2
abbreviation
Epistle to the Galatians (in biblical references).
- protonephridium
- protonephron
- protonephros
- proton gradiometer
- protonic
- protonically
- proto-Nile
- proton magnetometer
- protonmotive
- protonmotive force
- protonosphere
- protonotarial
- protonotariat
- protonotary
- Protonotary Apostolic
- Protonotary Apostolical
- proton-precession magnetometer
- proton synchrotron
- protonym
- protonymph
- protonymphal
- protonymphon
- proto-ocean
- proto-oncogene
- proto-organism