| Main Entry: | dissolved oxygen |
| Part of Speech: | n |
| Definition: | the amount of oxygen dissolved in a body of water as an indication of the degree of health of the water and its ability to support a balanced aquatic ecosystem; also, the amount of free (not chemically combined) oxygen dissolved in water, wastewater, or other liquid, usually expressed in milligrams per liter, parts per million, or percent of saturation; abbr. DO |
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| a gadget; dingus; thingumbob. |
| a chattering or flighty, light-headed person. |