diameter

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Related to diametral: Diametral Pitch

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]

diameter

/di·am·e·ter/ (di-am´ĕ-ter) the length of a straight line passing through the center of a circle and connecting opposite points on its circumference. Symbol d.
anteroposterior diameter  the distance between two points located on the anterior and posterior aspects, respectively, of the structure being measured, such as the true conjugate diameter of the pelvis or occipitofrontal diameter of the skull.
Baudelocque's diameter  external conjugate d.; see pelvic d.
conjugate diameter  see pelvic d.
cranial diameters  distances measured between certain landmarks of the skull, such as biparietal, that between the two parietal eminences; bitemporal, that between the two extremities of the coronal suture; cervicobregmatic, that between the center of the anterior fontanel and the junction of the neck with the floor of the mouth; frontomental, that between the forehead and chin; occipitofrontal, that between the external occipital protuberance and most prominent midpoint of the frontal bone; occipitomental, that between the external occipital protuberance and the most prominent midpoint of the chin; suboccipitobregmatic, that between the lowest posterior point of the occiput and the center of the anterior fontanel.
pelvic diameter  any diameter of the pelvis, such as diagonal conjugate, joining the posterior surface of the pubis to the tip of the sacral promontory; external conjugate, joining the depression under the last lumbar spine to the upper margin of the pubis; true (internal) conjugate, the anteroposterior diameter of the pelvic inlet, measured from the upper margin of the pubic symphysis to the sacrovertebral angle; oblique, joining one sacroiliac articulation to the iliopubic eminence of the other side; transverse (of inlet), joining the two most widely separated points of the pelvic inlet; transverse (of outlet), joining the medial surfaces of the ischial tuberosities.
Enlarge picture
Diameters of pelvic inlet (see also pelvic planes ).

diameter (D)

[dī·am′ə·tər]
Etymology: Gk, diametros
1 the length of a straight line passing through the center of a circle and connecting opposite points on its circumference.
2 the distance between two specified opposite points on the periphery of a structure such as the cranium or pelvis.

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]

diameter

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.
pelvic diameter
any of the diameters of the pelvis; any measurement that expresses the diameter of the birth canal in the female.
References in periodicals archive ?
Adicionalmente, NSR-10 no propone modelos o ecuaciones para estimar las propiedades mecanicas del CRFA, en especial, las propiedades que gobiernan el desempeno a tension del CRFA, tal como la resistencia a tension por compresion diametral.
En las capsulas que contenian licor Kraft de pino Caribe, a los 8 dias de haberse realizado la inoculacion del hongo de pudricion marron unicamente se presento crecimiento del mismo para la concentracion de licor al 10 %, con promedio de crecimiento diametral para la primera semana de 2,72 cm.
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1) Determinar la deformacion diametral de los pernos de roca inflables al aplicar compresion.
La presencia de granos de quinoa arqueologica de una etnovariedad con diametro mas pequeno como las registradas en los sitios Chinuil Vinto y Cueva del Diablo (quinoa Blanca con una media diametral de 1,64 mm [1,45-1,80 mm], y de 1,6-1,7 mm [1,4 a 1,85 mm], respectivamente), que generalmente se corresponde con ecotipos de regiones alejadas del Norte de Lipez, ya sea del Altiplano norte de Bolivia o de la Puna argentina (Jujuy y Salta) (Lopez, 2012), lleva a pensar en el intercambio de granos de quinoa cultivados en otras localidades.
Definition 9 We define the circumcircle sphere as the sphere having the circumcircle of the base triangle as diametral circle.
Moreover, no significant discrepancy in the diametral tensile strengths (DTS) and degrees of conversion of the prepared and the commercial samples was found.
Posteriormente las respuestas morfologicas para las plantulas de Rhizophora mangle, Lagunculariaracemosa y Avicenniagerminans utilizadas para este estudio, registraron que el efecto generado por el petroleo crudo en las tres especies de plantulas de mangle para este estudio, se registro directamente en los procesos de desarrollo optimo, traduciendose esto en una reduccion de las tasas de crecimiento en terminos de altura e incremento diametral.
Por ejemplo, en Pinus patula se han encontrado incrementos en el crecimiento diametral y en la biomasa global cuando el arbol crece asociado con especies fijadoras de nitrogeno (Gutierrez-Guzman et al.
Brief detail of workpiece gear and ECH tool Workpiece Gear Specification diametral pitch: 4, number of teeth: 12, face width: 15 mm Material EN 8 (Fe [approximately equal to] 98.
Dessa forma, o negro drama estabelece uma representacao diametral aquela atribuida em Freyre ao homem "mestico" ou "mulato" estabelecidos como incorporacao da cultura nacional pelo processo de miscigenacao.
The diametral tensile strength of PLA/HA composite prepared from PLA-grafted HA was found to be over twice that of the composite prepared from the non-modified HA.