have ones ear to the ground
|ear 1 (îr) Pronunciation Key
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The vertebrate organ of hearing, which in mammals is usually composed of three parts: the outer ear, middle ear, and inner ear. The organs of balance are also located in the ear.
An invertebrate organ analogous to the vertebrate ear.
|ear 2 (îr) Pronunciation Key
The seed-bearing spike of a cereal plant, such as corn or wheat.
The American Heritage® Science Dictionary
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