(n.) One who darts, or who throw darts; that which darts.
(n.) The snakebird, a water bird of the genus Plotus; -- so called because it darts out its long, snakelike neck at its prey. See Snakebird.
(n.) A small fresh-water etheostomoid fish. The group includes numerous genera and species, all of them American. See Etheostomoid.
Example Sentences:
(1) Histochemical and ultrastructural studies were conducted on the metacercarial cyst of the cryptogonimid trematode Bolbogonotylus corkumi from the muscle tissue of fantail darters Etheostoma flabellare.
(2) "It took a lot of bottle for me to keep my courage after I'd done that nine-darter.
(3) There are reports from South Yorkshire of common darter dragonflies on sunny days this month, toads and frogs that would usually be hibernating were seen last week, and there was a rare sighting for so far north of a Cetti's warbler ; and as well as the swallow at Saltholme, RSPB staff there spotted dragonflies in the wildlife garden and pondskaters, which should also be hidden away in sheds and tree cracks for the winter.
(4) The 25-year-old from Stoke, schooled in the game by the 15-time winner Phil Taylor, racked up the first nine-darter in a world final as he lifted his first PDC crown.
(5) Finally, the fallacy of the 'snail darter syndrome', where species may be viewed as too insignificant to worry about, is exposed by consideration of the pharmacological activities of a sea hare (a shell-less marine mollusc) and various leeches.
Retard
Definition:
(v. t.) To keep delaying; to continue to hinder; to prevent from progress; to render more slow in progress; to impede; to hinder; as, to retard the march of an army; to retard the motion of a ship; -- opposed to accelerate.
(v. t.) To put off; to postpone; as, to retard the attacks of old age; to retard a rupture between nations.
(v. i.) To stay back.
(n.) Retardation; delay.
Example Sentences:
(1) It is followed by rapid neurobehavioral deterioration in late infancy or early childhood, a developmental arrest, plateauing, and then either a course of retarded development or continued deterioration.
(2) Low birth weight, short stature, and mental retardation were common features in the four known patients with r(8).
(3) It was found that preterm infants (delivered before 38 weeks of gestation) had nine times the early neonatal mortality of term infants, irrespective of growth retardation patterns.
(4) Instead of later renal failure and, of course, mental retardation, it was the histological features of the fetus eyes which permit to diagnose and exhibit both congenital cataract and irido-corneal angle dysgenesis.
(5) In the interim, sonographic studies during pregnancy in women at risk for AIDS may be helpful in identifying fetal intrauterine growth retardation and may help raise our level of suspicion for congenital AIDS.
(6) Three types of responses were observed: group A, no inhibition of gastric acid secretion occurred in 17 (40%) ulcer patients and in three (18%) controls (p less than 0.05); group B, inhibition of gastric acidity occurred in seven (16%) ulcer patients and in 12 (71%) controls (p less than 0.05), and group C, retarded gastric acid inhibition occurred in 19 (44%) duodenal ulcer patients and in 2 (12%) controls (p less than 0.05).
(7) This new way of thinking is reflected in the 1992 AAMR definition of what mental retardation is (Luckasson et al., 1992).
(8) Confirmation of the striking correlation between increased urinary ammonia and lowered neonatal ponderal index may afford a simple test for the identification of nutrient-related growth retardation.
(9) Governmental officials as well as medical scientists in Taiwan have worked hard in recent years to develop and to implement various measures, such as prenatal diagnosis and neonatal screening, to lower the incidence of hereditary diseases and mental retardation in the population.
(10) A lower than normal percentage of REM sleep in these patients was consistent with their retarded intellectual development, which supports current thinking that REM sleep may be a sensitive index of brain function integrity.
(11) Bone age has been analyzed mixed-longitudinally in a subsample of 370 patients (660 observations) and showed a slight retardation at all ages between 6 and 13 yr. Development of pubic hair of 91 subjects analyzed cross-sectionally was definitely retarded when compared to adequate reference data.
(12) The results also suggest that both alkali metals most probably have been delivered to the suckling pups and some of their toxic effect was retarded.
(13) However, patients can be taught how to retard the onset of wrinkles by avoiding unprotected sun exposure, unnecessary facial movements, and certain sleeping positions.
(14) Between-group responsivity differences suggest developmental retardation in term (38-42 weeks) SGA newborns, but the faster SGA latencies may reflect 'induced' acceleration in auditory neurophysiologic function.
(15) Fifty-one severely retarded adults were taught a difficult visual discrimination in an assembly task by one of three training techniques: (a) adding and reducing large cue differences on the relevant-shape dimension; (b) adding and fading a redundant-color dimension; or (c) a combination of the two techniques.
(16) Thus, the patient with asymptomatic bacteriuria and a positive FA test is at greater risk of delivering an intrauterine growth-retarded infant.
(17) Diffusional anisotropy of water protons, induced by nonrandom, directional barriers which hinder or retard water motion, is measurable by MRI.
(18) Partial duplication of the proximal part of the long arm of chromosome 5, on the other hand, is associated mainly with musculoskeletal abnormalities including muscle hypotrophy and hypotonia, scoliosis, lordosis, pectus carinatum, cubitus valgus, and genu valgum, in addition to psychomotor retardation.
(19) In contrast, the same concentration of isopropanol produced narcosis in the dams, retarded body-weight gain and reduced the feed intake.
(20) A lysosomal membrane labilizer, vitamin A, exacerbated the cartilage pathology, whereas a stabilizer, cortisone, retarded it.