What's the difference between gallon and runlet?

Gallon

Definition:

(n.) A measure of capacity, containing four quarts; -- used, for the most part, in liquid measure, but sometimes in dry measure.

Example Sentences:

(1) BP sprayed almost 2m gallons of Corexit on the slick and at the leak site on the seabed.
(2) Individual males held in gallon-sized containers inseminated as many as 10 females.
(3) On July 14, 1991, a train tanker car derailed in northern California, spilling 19,000 gallons of the soil fumigant metam sodium (sodium methyldithiocarbamate) into the Sacramento River north of Redding (Figure 1).
(4) Already the price of petrol has risen to at least $3.50 a gallon (94 cents a litre) – just over double Sunday's morning price of about $1.70 a gallon (45 cents a litre).
(5) A major 1970 oil spill in Ogoniland in the south-east of Nigeria led to thousands of gallons being spilt on farmland and rivers, ultimately leading to a £26m fine for Shell in Nigerian courts 30 years later .
(6) Satellite data, analysed by University of California at Irvine scientists, suggest that the state has been losing about 4tn gallons of water a year from the Sacramento and San Joaquin river basins since the drought began in 2011.
(7) His shop was destroyed by water damage What destroyed my business completely was not the fire [next door] but the gallons and gallons of water which the fire brigade poured over the building.
(8) They replied that an average day’s drilling uses about 1,000 gallons of diesel.
(9) 25.4 cm) fiberglass depth cartridge and a 10-inch pleated epoxy-fiberglass filter in a series at flow rates of up to 37.8 liters (10 gallons) per min.
(10) "And just as cars will go further on a gallon of gas, our economy will go further on a barrel of oil."
(11) That's barely a quarter of the average daily use in the US , a global water-hog that uses nearly 500 gallons a day per capita (or nearly 600 US gallons).
(12) GRRRR," he guffawed, eyebrows wiggling lasciviously, before being ejected from Booty at 230mph courtesy of a broom and a gallon of budget acrylic nail glue.
(13) But the bigger question is why in a shortsighted attempt to reduce greenhouse gases by a tiny amount (diesel cars do more miles to the gallon) the risks were ignored, and customers persuaded that diesel cars were actually greener.
(14) That's barely a quarter of the average daily use in the US, a global water-hog that uses nearly 500 gallons a day per capita."
(15) The helicopters can haul up to 2,000 gallons of water.
(16) The nationwide average price of a gallon of regular is now $2.02 (£1.36), down 58 cents from this time last year, according to auto club AAA, and expected to fall further.
(17) The response of microorganisms to an accidental spillage of 55,000 gallons of leaded gasoline into an Arctic freshwater lake was studied.
(18) They could have taken a thousand gallons of water and just intercepted the fire before it got to my place.” Facebook Twitter Pinterest John Belles stands on a scorched hill overlooking his concrete dome house.
(19) A 14-year-old male drank two glasses of milk from a gallon inoculated with 21 vials of live virus vaccine intended to immunize 1000 baby chicks against Newcastle Disease.
(20) The plaintiffs claim Chevron's operations discharged billions of gallons of toxic waste into Amazon lands, affecting over 1,500 square miles of the Amazon, causing cancer rates to soar, destroying locals' livelihoods and habitats, and killing flora and fauna.