crown-heel length

length

 [length]

an expression of the longest dimension of an object, or of the measurement between its two ends.

crown-heel length (CHL) the distance from the crown of the head to the heel in embryos, fetuses, and infants; the equivalent of standing height in older persons.

Measuring an infant's crown-heel length. From Lammon et al., 1996.

crown-rump length (CRL) the distance from the crown of the head to the breech in embryos, fetuses, and infants; the equivalent of sitting height in older subjects.

cycle length in cardiac pacing terminology, the time interval in milliseconds from one event to the next; it is the inverse of the intrinsic rate (beats per minute) or the paced rate (pulses per minute).

focal length the distance between a lens and an object from which all rays of light are brought to a focus.

Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

crown-heel length

(CHL) (krown-hēl length)

Length of an outstretched 8-week embryo or fetus from the vertex of the cranium to the heel.
See also: crown-rump length

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

crown-heel length

(krown-hēl length)

Length of an outstretched 8-week embryo or fetus from the vertex of the cranium to the heel.
See also: crown-rump length

Medical Dictionary for the Dental Professions © Farlex 2012