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1. Mathematics
a. A closed line bounding a plane area.
b. The length of such a line.
2. The outer limits of an area. See Synonyms at circumference.
3. A defended boundary protecting a military position.
4. Basketball The three-point line.

[Middle English perimetre, from Latin perimetros, from Greek : peri-, peri- + metron, measure; see meter2.]

per′i·met′ric (pĕr′ə-mĕt′rĭk), per′i·met′ri·cal (-rĭ-kəl) adj.
per′i·met′ri·cal·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
02 What does a sensitivity value of 'OdB' or '<0dB' mean on any perimetric instrument?
Using the Angiovue OCT system, discrimination between perimetric open-angle glaucoma eyes and normal eyes was stronger with peripapillary vessel density than RNFL thickness, (12) but the opposite was found for distinguishing angle-closure glaucoma eyes from normal eyes.
Accuracy of the retinal nerve fiber layer measurements by stratus optical coherence tomography for perimetric glaucoma.
The patients who were above 40 years of age with clinical and perimetric evidence of POAG, intraocular pressure over 21 mmHg even after Maximum Medical Therapy (MTMT) and with no previous history of ocular surgery were included in our study.
Also, the high and low estimated [alpha] patterns of the regions that are close to the perimetric boundary of the artificial island in Figure 12(a) resemble the high and low first maximum cross-correlation results in Figure 7(c).
Katsanos et al., "Perimetric and retinal nerve fiber layer findings in patients with Parkinson's disease," BMC Ophthalmology, vol.
The cohort of patients was divided into 2 groups: patients with glaucoma or "cases" and healthy patients or "controls." The glaucoma subjects had to meet two diagnosis criteria: (1) glaucomatous appearance of the optic disc evaluated by a glaucoma specialist, defined as focal or diffuse neuroretinal rim narrowing with concentric enlargement of the optic cup, localized notching or both [15] and (2) perimetric criteria for glaucoma: glaucoma Hemifield Test (GHT) results outside normal limits, a pattern standard deviation (PSD) with a P value < 5%, or a cluster of three or more nonedge points on the pattern deviation plot in a single hemifield with P values < 5%, one of which must have a P value < 1%.
Methods of fixed-size regionalization: (a) strips; (b) perimetric strips; (c) circular; (d) rectangular; (e) angular.
De Gregorio, "Therapeutic value of citicoline in the treatment of glaucoma (computerized and automated perimetric investigation)," International Ophthalmology, vol.
The schematic of the perimetric configuration is identical to the one shown in Figure 3, with the exception of the position of the stator (transmission line), which in this case is positioned in the external perimeter of the rotor, as indicated in Figure 5.