diameter

diameter (dI-am´e-ter)

1. A straight line connecting two opposite points on the surface of a more or less spherical or cylindrical 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]
anteroposterior d. of the pelvic inlet conjugate of pelvic inlet
Baudelocque's d. external conjugate
biparietal d. the d. of the fetal head between the two parietal eminences.
buccolingual d. the d. of the crown of a tooth measured from the buccal to the lingual surfaces.
conjugate d. of pelvic inlet conjugate of pelvic inlet
conjugate d. of pelvic outlet conjugate of pelvic outlet
diagonal conjugate d. diagonal conjugate
external conjugate d. external conjugate
d. media´na conjugate of pelvic inlet
d. obli´qua [NA] oblique d
oblique d. a measurement across the pelvic inlet from the sacroiliac joint of one side to the opposite iliopectineal eminence.d. obliqua [NA];
obstetric conjugate d. obstetric conjugate
occipitofrontal d. the d. of the fetal head from the external occipital protuberance to the most prominent point of the frontal bone in the midline.
occipitomental d. the d. of the fetal head from the external occipital protuberance to the midpoint of the chin.
posterior sagittal d. distance from the sacrococcygeal junction to the middle of an imaginary line running between the left and right ischial tuberosities.
suboccipitobregmatic d. the d. of the fetal head from the lowest posterior point of the occipital bone to the center of the anterior fontanelle.
total end-diastolic d. (TEDD) cross sectional d. of the left ventricle including the septum and posterior wall thicknesses in diastole.
total end-systolic d. (TESD) cross sectional d. of the left ventricle including the septum and posterior wall thicknesses in systole.
trachelobregmatic d. the d. of the fetal head from the middle of the anterior fontanelle to the neck.
d. transver´sa [NA] transverse d
transverse d. the transverse d. of the pelvic inlet, measured between the terminal lines.d. transversa [NA];
zygomatic d. the extreme breadth of the skull at the zygomatic arches.

 

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