What's the difference between dull and null?

Dull


Definition:

  • (superl.) Slow of understanding; wanting readiness of apprehension; stupid; doltish; blockish.
  • (superl.) Slow in action; sluggish; unready; awkward.
  • (superl.) Insensible; unfeeling.
  • (superl.) Not keen in edge or point; lacking sharpness; blunt.
  • (superl.) Not bright or clear to the eye; wanting in liveliness of color or luster; not vivid; obscure; dim; as, a dull fire or lamp; a dull red or yellow; a dull mirror.
  • (superl.) Heavy; gross; cloggy; insensible; spiritless; lifeless; inert.
  • (superl.) Furnishing little delight, spirit, or variety; uninteresting; tedious; cheerless; gloomy; melancholy; depressing; as, a dull story or sermon; a dull occupation or period; hence, cloudy; overcast; as, a dull day.
  • (v. t.) To deprive of sharpness of edge or point.
  • (v. t.) To make dull, stupid, or sluggish; to stupefy, as the senses, the feelings, the perceptions, and the like.
  • (v. t.) To render dim or obscure; to sully; to tarnish.
  • (v. t.) To deprive of liveliness or activity; to render heavy; to make inert; to depress; to weary; to sadden.
  • (v. i.) To become dull or stupid.

Example Sentences:

  • (1) "Maybe dullness is associated with psychic pain," Wallace wrote at one point, "because something that's dull or opaque fails to provide enough stimulation to distract people from some other, deeper type of pain that is always there, if only in an ambient low-level way, and which most of us spend nearly all our time and energy trying to distract ourselves from."
  • (2) Similar systems were put in place at Dulles outside Washington DC, Newark and Chicago airports on Thursday.
  • (3) The soft, dull, malacic appearance of the center results from lack of a true surface layer of tangential collagen fibers.
  • (4) Here I am in Los Angeles being paid $30,000 to do next to nothing and still I'm finding life rather dull.
  • (5) A significant proportion of splenic B cells reacted with these mAb, although lower number (one-log less) than peritoneal B cells and a small proportion of H7dull+ splenic B cells seems to be Ly-1(CD5)dull+, 1 of 200 splenic B cells responded to IL-5 for IgM production.
  • (6) A 58-year-old man complained of dull left lower quadrant pain and constipation.
  • (7) They will begin next week at Liberty airport in Newark, New Jersey; Dulles, outside Washington DC; Chicago O’Hare, and Hartsfield-Jackson in Atlanta.
  • (8) At both observations, crowns were rated on 5-point Likert scales for outline form, porosity, smoothness, reflectance, texture, dullness, defects, and general esthetic appearances.
  • (9) On the other hand AMH2 showed the dull-positive reaction with some monocytes and pleural exudate cells among above-mentioned cells.
  • (10) Britain’s Got Talent review – Simon Cowell is looking like Caligula after a dull day at the Coliseum Read more The show, won last year by boy band Collabro, began eight years ago with 4.9 million viewers, rising to 8.8 million for its second series launch before hitting the 10 million mark for the first time in 2009 with 10.3 million.
  • (11) Disseminated annular psoriasiform lesions developed over a period of 2 months in a 48-year-old man with no preceding psoriatic history of drug intake, being accompanied by general dullness and arthralgia.
  • (12) 3) At the severe stage, pain and dullness at the back, numbness at arms and hands, hand coldness, sleep disturbance etc.
  • (13) One month after surgery, she complained of swelling and a dull pain in the right leg without cardiorespiratory symptoms.
  • (14) Black-hair follicular dysplasia in dogs of mixed breeding was delineated by hypotrichosis and dullness of most black regions of the coat.
  • (15) Endoscopic examination disclosed an almost roundish, smooth-surfaced, flat and dull red area corresponding to IIc (slightly depressed type).
  • (16) Their surface phenotype was Thy-1+(dull), Ly-1.2+(dull), Lyt-2-, L3T4-, 9F3+, and 3A1+, which is consistent with that found in intact lpr mice.
  • (17) The engines, gearboxes and even the doors now have a complexity that sees them constructed elsewhere, but the transformation on this line of the dull sheen of aluminium parts into a moving vehicle at the other end is still something to behold.
  • (18) Flow cytometry showed three types of trophozoite staining by mAb: (i) bright staining of greater than 90% of trophozoites, with aggregation of the organisms; (ii) bright staining of approximately 90% of trophozoites, with little or no aggregation; (iii) dull staining of approximately 20% of trophozoites, without aggregation.
  • (19) The percentage of dull CD8+CD11b+ cells (natural killer cells) among TG-2 cells was lower than that in peripheral blood, but there was no significant difference in bright CD8+CD11b+ cells (suppressor-effector T cells) between thyroid glands and peripheral blood.
  • (20) It was filed in my mind as a pretty but dull destination, full of pensioners on package deals and cruises.

Null


Definition:

  • (a.) Of no legal or binding force or validity; of no efficacy; invalid; void; nugatory; useless.
  • (n.) Something that has no force or meaning.
  • (n.) That which has no value; a cipher; zero.
  • (v. t.) To annul.
  • (n.) One of the beads in nulled work.

Example Sentences:

  • (1) Measurements of acetylcholine-induced single-channel conductance and null potentials at the amphibian motor end-plate in solutions containing Na, K, Li and Cs ions (Gage & Van Helden, 1979; J. Physiol.
  • (2) DR(+) cells, however, showed no change in percentage and a lesser drop in absolute numbers, suggesting an increase with advancing disease of DR(+), Ig(-) null cells, which may represent immature B cell precursors.
  • (3) In this report we describe an improvement upon the design by Stanton and Lightfoot for a simple photographic null method to determine the kVp of a diagnostic region x-ray source.
  • (4) At least two (Rh null and the McLeod type) are responsible for congenital hemolytic disorders.
  • (5) (2) Sequences of brightness steps of like polarity (either increments or decrements) elicit positive and negative motion-dependent response components when mimicking motion in the cell's preferred and null direction, respectively.
  • (6) The analysis also involved statistical tests of a modified null hypothesis, the generation of confidence intervals (CIs) and a meta-analysis.
  • (7) The null potential of both responses became more and less negative with a decrease and an increase, respectively, in the extracellular potassium concentration.
  • (8) The null mutation of algR was generated in a mucoid derivative of the standard genetic strain PAO responsive to different environmental factors.
  • (9) Endoneurial fluid pressure (EFP) was recorded by an active, servo-null pressure system after a glass micropipette was inserted into rat sciatic nerve undergoing wallerian degeneration.
  • (10) In thymo-deprived mice (nude mice and B mice) the percentage of null cells increases during the stage of regeneration, and B mice develop a large number of Ig +-bearing cells.
  • (11) Alkaline phosphatase activity was elevated in the lymphocytes from T-CLL, cord blood and tonsils and the blast cells from Null-ALL.
  • (12) Analysis of ldlA cells has identified three classes of mutant alleles at the ldlA locus: null alleles, alleles that code for normally processed receptors that cannot bind LDL, and alleles that code for abnormally processed receptors.
  • (13) Putative null sup-38 mutations cause maternal-effect lethality which is rescued by a wild-type copy of the locus in the zygote.
  • (14) Null cells of patients with hypoplastic anemia did not produce erythroid colonies under any culture conditions.
  • (15) Comparison of simulated versus actual inheritance data demonstrates that the so-called null structural alleles actually produce functional globins.--The genetic controls in Peromyscus may be analogous to those in primates.
  • (16) A null zone and associated sudden phase-reversal of RSA were observed in stratum lucidum of CA3.
  • (17) When the stimulus is placed at a position approximately 80 degrees dorsal to the eye axis, there is no response; this area is called the null region.
  • (18) Northern blot analysis showed that Adh-1 mRNA was synthesized at wild-type levels in immature seeds of the null mutant, but dropped to 25% in mature seeds.
  • (19) Two tumours were null cell adenomas with PIs less than 0.1 and 0.2%.
  • (20) Thus this methodology offers the potential to study naturally occurring ADH electromorphs and null alleles independent of enzymatic activity assays.