| 释义 |
DictionarySeelengthcrown-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 pacing" >cardiac pacing terminology, the time interval in milliseconds from one event to the next; it is the inverse of the rate" >intrinsic rate (beats per minute) or the rate" >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.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 lengthcrown-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 lengthAcronymsSeeCHL |