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

plural of aquifer

plural of artesian aquifer

A confined aquifer containing groundwater under positive pressure.

(geology) Of or pertaining to an aquifer / Carrying water

(zoology) The system of connected water channels that is unique to sponges (Porifera). / (zoology, dated) The hydrostatic skeleton of certain marine gastropods.

plural of aquiferous system