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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. 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.
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