diameter

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diameter

 [di-am´ĕ-ter]
the length of a straight line passing through the center of a circle and connecting opposite points on its circumference; hence the distance between the two specified opposite points on the periphery of a structure such as the cranium or pelvis.
cranial d's (craniometric d's) imaginary lines connecting points on opposite surfaces of the cranium; the most important are biparietal, that joining the parietal eminences; bitemporal, that joining the extremities of the coronal suture; cervicobregmatic, that joining the center of the anterior fontanel and the junction of the neck with the floor of the mouth; frontomental, that joining the forehead and chin; occipitofrontal, that joining the external occipital protuberance and the most prominent midpoint of the frontal bone; occipitomental, that joining the external occipital protuberance and the most prominent midpoint of the chin; suboccipitobregmatic, that joining the lowest posterior point of the occiput and the center of the anterior fontanel.
pelvic diameter see pelvic diameter.

di·am·e·ter

(dī-am'ĕ-tĕr),
1. A straight line connecting two opposite points on the surface of a more or less spheric or cylindric body, or at the boundary of an opening or foramen, passing through the center of such body or opening.
2. The distance measured along such a line.
[G. diametros, fr. dia, through, + metron, measure]

di·am·e·ter

(dī-am'ĕ-tĕr)
1. A straight line connecting two opposite points on the surface of a more or less spheric or cylindric body, or at the boundary of an opening or foramen, passing through the center of such body or opening.
2. The distance measured along such a line.
[G. diametros, fr. dia, through, + metron, measure]
References in periodicals archive ?
The story of why a ".38" is a ".36" is a twisted tale of internal barrel diameters, obsolete percussion revolvers, and abominable accuracy.
Conclusion: The IMA and LTA diameters in benign and malignant cases were found to be higher in comparison with contralateral breast, independent of the size of the lesion.
The 4-inch diameter is available in .065-inch thickness, while the 4 1/2- and 5-inch diameters come in both 1/8- and .065-inch thicknesses.
The objective of this study is to measure the certain pelvic diameters in New Zealand rabbits and reveal their biometric differences in terms of sexes, based on 3D reconstructions of pelvis-related MDCT images.
In the present study the diameters were smaller than those observed by Barut [5] and Szpinda [4], which may be attributed to racial or individual morphological differences.
Clients working with pipes and tubes wanted to use stock and parts diameters. Clients from construction businesses wanted to use material types (I-Beams, T-Beams, etc).
HONOLULU--The diameter of the brain across the parietal lobes in premature infants is an independent predictor of mental development at age 2 years, according to a study of 189 preterm infants and 36 term infants.
Consisting of three units, the finished tool had a length of only 3,200 mm and was capable of continuous inspection of internal diameters between 16 inches and 24 inches (Figure 3).
Both the flange mounted with slit clamp supports and flange mounted with inlay slit clamp supports accommodate 8-to 30-mm shaft diameters, while dowel hole flange-mounted with slit clamp supports accommodate 12 to 30mm shaft diameters.
ARTERIAL DIAMETER EVALUATION OF THE CELIAC TRUNK AND ITS BRANCHES.
For spherical particles of unit density, settling times (for a 3-m fall) for specific diameters are 10 s for 100 [micro]m, 4 min for 20 [micro]m, 17 min for 10 [micro]m, and 62 min for 5 [micro]m; particles with a diameter <3 [micro]m essentially do not settle.