CR

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Cr,

symbol for the element chromiumchromium
[Gr.,=color], metallic chemical element; symbol Cr; at. no. 24; at. wt. 51.9961; m.p. about 1,857°C;; b.p. 2,672°C;; sp. gr. about 7.2 at 20°C;; valence +2, +3, +6. Chromium is a silver-gray, lustrous, brittle, hard metal that can be highly polished.
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Cr

(chemistry)

CR

(chemical engineering)

CR

1. Abbr. for cold-rolled.
2. Abbr. for “ceiling register.”

cross

cross, 3
1. An object consisting primarily of two straight or nearly straight pieces forming right angles with one another; the usual symbol of the Christian religion.
2. A monument or small building of any kind surmounted by a cross, 1, as a market cross.

CR

(1)

cr

(networking)
The country code for Costa Rica.

CR

(1) See cognitive radio and conversion rate.

(2) (Carriage Return) The character code generated when the Enter key is pressed. In ASCII and EBCDIC systems, the code is a decimal 13 or hex 0D. See line break.
References in periodicals archive ?
This diagnosis was based on a symptom-generated ultrasound that showed an empty gestational sac; a gestational sac with a yolk sac but no embryo when the mean gestational sac diameter was less than 20 mm or less than 30 mm; or an embryo with an absent heart beat and a crown-rump length of less than 6 mm or less than 8 mm.
Table 1: Comparisons of placental weights, live and dead fetuses number, fetus weights, and fetal resorption and crown-rump lengths among groups (mean [+ or -] SD) Control Vitamin E Placenta weight (g) 0.
Accuracy of gestational age estimation by means of fetal crown-rump length measurement.
Statistical tests used were analysis of variance (ANOVA) for litter size, analysis of covariance (ANCOVA) using litter size as a covariate for newborn weight and crown-rump length, implantation sites, and resorptions, and repeated-measures ANCOVA for weight changes during pregnancy, where weight of the mother at GD6, 9, 12, 15, and 18 was the repeated measure and weight at GDO was the covariate.
The fetus weighed 96 g and had a crown-rump length of 13.
Viability was 100% in 38 pregnancies in which fetal heart rates exceeded 100 beats per minute and embryos were determined to be growing appropriately at 5-6 weeks based on crown-rump length on ultrasound, explained Dr.
Other factors predicting absent nasal bone in karyotypically normal fetuses included greater crown-rump length (from 4.
Four were pregnant with embryo crown-rump (CR) measurements ranging from 7 to 11mm and the fifth female was lactating.
In normal pregnancies, crown-rump lengths increase by 1 mm/day, and the days of gestational age can be estimated by adding the crown-rump length plus 42, Dr.
Adult females in this collection yield the following reproductive information: 26 June 1996, two pregnant, each with one fetus, measuring 28 and 31 mm in crown-rump length, and one with no evident reproductive activity; 17 July 1996, one with no evident reproductive activity.