(algebra, Galois theory) A subfield of a given field which contains all of the fixed points that are common to all of the automorphisms of some subgroup of the automorphism group of that given field.

plural of open-field test

A scientific test to gauge an animal's locomotor activity levels, anxiety, and willingness to explore, by placing the animal in an enclosed arena and observing its actions.

plural of field-book

Alternative form of field book

(military) Actively engaged in fighting or dealing with the enemy; in battle or on maneuvers. / Away from the office, classroom, or laboratory; working with people or things in their natural environment.

A census-designated place in Humboldt County, California, United States.

Alternative spelling of field of honor

plural of field bindweed

A common and invasive Eurasian perennial weed, Convolvulus arvensis, which has become established worldwide.