gal has definitions from the field of physics
1
[ noun ] United States liquid unit equal to 4 quarts or 3.785 liters

Synonyms

gallon

Used in print

(Ross E. McKinney and Howard Edde, "Aerated...)

The pilot plant was a circular lagoon 81 ft in diam at the surface and 65 ft in diam at the bottom , 4 ft below the surface , with a volume of 121000 gal .

2
[ noun ] (physics) a unit of gravitational acceleration equal to one centimeter per second per second (named after Galileo)

Related terms

acceleration_unit

3
[ noun ] (informal) alliterative term for girl (or woman)

Related terms

girl colloquialism

*