(a.) To make dark or black; to deprive of light; to obscure; as, a darkened room.
(a.) To render dim; to deprive of vision.
(a.) To cloud, obscure, or perplex; to render less clear or intelligible.
(a.) To cast a gloom upon.
(a.) To make foul; to sully; to tarnish.
(v. i.) To grow or darker.
Example Sentences:
(1) Immediate pigment darkening (IPD) occurs in human skin upon exposure to ultraviolet-A and visible radiation.
(2) There would never be a meeting in a darkened room where a winner was chosen just to fit an audience demographic or to create more entertaining telly.
(3) Each subject sat for 6 minutes in a darkened room and was told to memorize a list of words she heard form a tape.
(4) Normal, refractile spores were produced in each case; a portion of the barium spores lost refractility and darkened.
(5) Instead of coming to the bank, where we would be photographed coming in the front door, we were all to meet outside the McDonald's in Liverpool Street where we would be picked up in a people-carrier with darkened windows and driven in through the back of the bank.
(6) The final stage of germination was characterized by changes in the central spore region (core), notably phase darkening of the spore center and stainability with mercurochrome, and by a slight additional absorbancy decrease.
(7) Confluent patches of flat pigmentation appeared over the palpebral conjunctiva 18 weeks after the onset of treatment and showed progressive lateral enlargement and darkening.
(8) The 16 sites were qualitatively examined for evidence of resorption by either thinning or darkening of bone relative to the time immediately following surgery.
(9) Today's matches take place in a darkened hall within the stadium's towering walls, on the battlefields of multimillion-selling first-person shoot-'em-up Call of Duty .
(10) alpha-Melanocyte stimulating hormone (alpha-MSH) is a linear tridecapeptide (Ac-Ser-Tyr-Ser-Met-Glu-His-Phe-Arg-Trp-Gly-Lys-Pro-Val-NH2) that has diverse physiological functions in addition to its reversible darkening of amphibian skins by stimulating melanosome dispersion within melanophores.
(11) 1) Asphyxia induced marked body colour darkening and bradycardia.
(12) The most striking feature of such neurons was darkening of their dendrites associated with abnormally high density cytoplasm that contained mitochondria with disrupted cristae.
(13) Braving darkening skies, they were initially in an upbeat mood, belting out the samba rhythm of carnival classic I'm Going to Celebrate.
(14) With official unemployment data today expected to show a further rise in the long-term unemployed, the TUC argues young people were some of the worst affected by Britain's deep recession and their outlook could darken further as public sector job losses intensify.
(15) beta-Adrenoceptor blocking agents, in contrast, inhibit catecholamine-induced darkening but have no effect on MSH-induced darkening.
(16) During the hibernation period, the epiphyseal catecholamine charge is well detected in the garden dormouse; it appears more important in darkened animals at 22 degrees C and much less in animals under continuous lighting.
(17) Melanocyte stimulating hormone-induced darkening or dispersion of the granules was reversed by each of these metabolites.
(18) Reactivation of the enzyme extracted from darkened leaves was achieved simply by adding a thiol compound.
(19) By analyzing the synaptic relationships of such "darkened" dendrites, connections in the upper dorsal horn can be deciphered.
(20) The specific activity of the light enzyme was consistently about twice that of the dark form when assayed at suboptimal (but physiological) pH (pH 7.0-7.3), and the former was also less sensitive to feedback inhibition by L-malate than that from darkened leaves under various conditions.
Harken
Definition:
(v. t. & i.) To hearken.
Example Sentences:
(1) In this regard, techniques for endomyocardial resection have been described by Harken and Josephson.
(2) On this base different direct surgical approaches were advocated by Guiraudon, proposing an encircling endocardial ventriculotomy and by Josephson and Harken recommending a subendocardial resection technique.
(3) The recent contributions of Sullivan, Harken and Gorlin (54), Weily and Genton (55), and Harker and Slicter (56) to our understanding of the role of the platelets in initiating such fibrinous deposition now provide us with a way to prevent such late degeneration of valves made of fascia lata.
(4) The new store "is a reflection of realising that the relationship we want to have with our customers should harken back to this sense of community, this unique store environment".
(5) A second case of malfunction of a Harken disk valve due to undue disk wear is reported.
(6) The first candidate to speak, former secretary of state Hillary Clinton, harkened back to the 1990s and the “vast right wing conspiracy” she once railed against in describing the investigation of her emails and use of a “private homebrew server” while leading the State Department.
(7) Read more It is a time-honored role for artist as designator, to point at the stuff of the physical world and revision it as art, harkening back to the readymade.
(8) It harkens to Kansas City's oldest community development corporation, the Black Economic Union, started in 1968 by NFL Hall of Famer Jim Brown to spur redevelopment in the city's black neighborhoods.
(9) For the creation of atrial septal defect (ASD), we have developed a new method (Method I) using modified Harken blade for the closed commissurotomy, in which the membranous septum of the fossa ovalis was incised in case of patent foramen ovale (PFO).
(10) Many of his proposals harkened back to the old populist PRI, promising pensions for the elderly, life insurance for single mothers to support their children through college, a program to end hunger and a new system of passenger trains.
(11) It harkens back to the most absurd moments of the cold war, when nuclear strategists followed the logic of deterrence over the cliff and into the abyss.” In its efforts to reassure its eastern European allies over the threat of Russian encroachment, the US has also been mixing its conventional and nuclear signalling.
(12) I don’t pick out a name – don’t want to hurt anybody or help anybody, frankly.” Trump, whose campaign slogan is “make America great again” harkened back to an era when he thought the country was great and there was bipartisanship.
(13) A porcine bioprosthetic valve was implanted in 528 patients (514 Hancock and 14 Carpentier-Edwards valves) and a prosthetic disc valve in 178 patients (102 standard disc Björk-Shiley, 34 Beall, and 42 Harken disc valves).
(14) Years of frustration of cardiac surgeons attempting to control intractable ventricular arrhythmia finally ended when the team of Harken, Josephson, and Horowitz performed electrophysiologically directed left ventricular endocardial resection and reported their early results 10 years ago.
(15) All P underwent aneurysmectomy and an excision of the altered endocardium by Harken's method.
(16) In 3 patients excision of the altered endocardium by Harken's method (endocardial peeling) was done; in 2 of the patients it was preceded by intraoperative electrophysiological study.
(17) A Harken prosthetic disc valve (DVR) was used in 53 patients and glutaraldehyde-preserved Hancock porcine xenograft (PVR) in 56 patients.
(18) Social media’s reaction to the photo essay harkened back to other uses of Twitter to discuss women’s experiences, including #WhyIStayed , which served as a public forum for women to discuss experiences of domestic abuse.
(19) (Conservatives show footage of Black Panthers at the polls, progressives harken back – not very far – the obstacles white legislators put in front of black voters.)
(20) In proposing the neurogenic and psychogenic groupings, we do not intend to harken back to antique "mind-body" distinctions.