field fever

field fever,

a form of leptospirosis caused by Leptospira grippotyphosa, which primarily affects agricultural workers. It is characterized by fever, abdominal pain, diarrhea, vomiting, stupor, and conjunctivitis. Also called canefield fever, harvest fever, mild fever, 7-day fever. See also leptospirosis.

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field

1. an area or open space, such as an operative field or visual field.

2. a range of specialization in knowledge, study or occupation.

3. in embryology, the developing region within a range of modifying factors.

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auditory field

the space or range within which stimuli will be perceived as sound.

field beans

see phaseolus.

field experiments

experiments conducted on large groups of animals in conditions thought to be average for the particular type of commercial operation.

field fever

leptospirosis.

field fungi

fungi that attack plants that grow in the field. See also storage fungi.

high-power field

the area of a slide visible under the high magnification system of a microscope.

individuation field

a region in which an organizer influences adjacent tissue to become a part of a total embryo.

low-power field

the area of a slide visible under the low magnification system of a microscope.

morphogenetic field

an embryonic region out of which definite structures normally develop.

field nettle

see stachys arvensis.

field pea

pisumsativum.

field penny-cress

see thlaspi arvense.

field poppy

see papaverrhoeas.

sequential field trial

a trial to which additional segments are added as results are obtained in original segments, e.g. concentrating efforts on aspects of the work which appear to be promising.

field trial

see field experiments (above).

visual field

the area within which stimuli will produce the sensation of sight with the eye in a straight-ahead position.