(n.) The leaves of a flower generally, especially when the calyx and corolla are not readily distinguished.
(n.) A saclike involucre which incloses the young fruit in most hepatic mosses. See Illust. of Hepatica.
Example Sentences:
(1) In contrast, mutations in another floral homeotic gene, APETALA2 (AP2), result in the replacement of the perianth organs by the reproductive organs.
(2) In ag mutants, the loss of AG function leads to the conversion of these organs to the perianth organs (petals and sepals).
(3) The proper time to pick the flower buds comes when they are fully developed before the perianth appears.
Sterile
Definition:
(a.) Producing little or no crop; barren; unfruitful; unproductive; not fertile; as, sterile land; a sterile desert; a sterile year.
(a.) Incapable of reproduction; unfitted for reproduction of offspring; not able to germinate or bear fruit; unfruitful; as, a sterile flower, which bears only stamens.
(a.) Free from reproductive spores or germs; as, a sterile fluid.
(a.) Fig.: Barren of ideas; destitute of sentiment; as, a sterile production or author.
Example Sentences:
(1) Theoretical findings on sterilization and disinfection measures are useless for the dental practice if their efficiency is put into question due to insufficient consideration of the special conditions of dental treatment.
(2) Sterile, pruritic papules and papulopustules that formed annular rings developed on the back of a 58-year-old woman.
(3) Gamma-irradiated splenic homogenates of armadillos infected with M. leprae proved sterile by conventional tests and media.
(4) All of the rabbits immunized with FCA developed sterile subcutaneous abscesses.
(5) The disappearance of the herbicide, Avadex (40% diallate), from five agricultural soils (differing in either pH, carbon content, or nitrogen content), incubated under sterile and non-sterile conditions, was followed for a period of 20 weeks.
(6) During periods of wet steam it was impossible to maintain consistent sterility of the mouse pellets even using a cycle of 126 degrees C for 60 minutes.
(7) Following the hypothesis that infertile patients may present emotional conflicts with regard to the wish of having a child, psychodynamic interviews were carried out with 116 infertile couples concomitantly with their first consultation at the Sterility Department.
(8) Sterilization rates at the time of abortions increased with increasing age and with increasing gravidity, but the total rates, adjusted for age and gravidity of patients, have changed little in the past 15 years.
(9) It remains to be seen, whether the small number and sterility causes were coincidental or manifest themselves in future, especially, if the sterility concerned can be classified as idiopathic.
(10) The results of the study suggest that perhaps tobramycin of cefotaxime-impregnated PMMA beads would produce local levels of antibiotic high enough to sterilize a given dead space for a period of 28 days.
(11) A relationship between the level of sterility induced by juvenoids and reductions in nymph-to-adult ratios permitted formulation of a biological action threshold for regulating treatment.
(12) Using sterile conditions, antibodies to G were incubated with a suspension of transformed cells at 4 degrees C, unbound antibodies were then removed, and the cells were incubated with the immunoabsorbent (3 micron magnetic beads; J. Ugelstad et al.
(13) There is a certain degree of swagger, a sudden interruption of panache, as Alan Moore enters the rather sterile Waterstones office where he has agreed to speak to me.
(14) The antibacterial property was evaluated by the width and sterility of the clear zone in the bacterial culture plates.
(15) Three mouse models of male-limited, hybrid-type sterility are available: the sterility controlled by the T-t genetic complex, the hybrid sterility system including the Hst-1 gene, and the sterility of carriers of various chromosomal anomalies.
(16) The main cause of sterility was complete tubal occlusion in 65.6% of the cases due to a high incidence of pelvic inflammatory diseases in the investigated patients.
(17) Highly educated women are less likely than those with little education to elect sterilizations and more likely to rely on barrier methods.
(18) Among 137 consecutive patients who had a sterile body site cultured for mycobacteria within 3 months of their first AIDS-defining episode of Pneumocystis carinii pneumonia, median survival was significantly shorter in those with disseminated MAC infection (107 days; 95% confidence interval [CI] 55-179) than those with negative cultures (275 days; 95% CI 230-318; P less than .01), even after controlling for age, absolute lymphocyte count, and hemoglobin concentration.
(19) Factors of negligible importance prognostically were: complete sterilization at mammary and axillary level after radiotherapy, persistence of florid cancer tissue at mammary level and histiocytosis of the axillary lymph nodes.
(20) The teflon dish is re-usable, resistant to sterilization procedures, and easy to assemble.