This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. An underground bed or layer of earth, gravel, or porous stone that yields water.

n. An underground layer of water-bearing porous stone, earth, or gravel

n. an underground bed or layer yielding ground water for wells and springs etc.. The water contained in an aquifer may be of great age, and in such cases is sometimes called fossil water.

n. In geology, a water-bearing bed or stratum, necessarily of some open-textured rock.

n. underground bed or layer yielding ground water for wells and springs etc

"The word aquifer comes from the two Latin words, aqua, or water, and ferre, to bear or carry."

geological formation    formation   

oasis   

aquifers    groundwater    transborder    willcome    curb-to-curb    weightlessness    outtime    heat-trapping    particulate    iron-hoop