What's the difference between black and blackhead?

Black


Definition:

  • (a.) Destitute of light, or incapable of reflecting it; of the color of soot or coal; of the darkest or a very dark color, the opposite of white; characterized by such a color; as, black cloth; black hair or eyes.
  • (a.) In a less literal sense: Enveloped or shrouded in darkness; very dark or gloomy; as, a black night; the heavens black with clouds.
  • (a.) Fig.: Dismal, gloomy, or forbidding, like darkness; destitute of moral light or goodness; atrociously wicked; cruel; mournful; calamitous; horrible.
  • (a.) Expressing menace, or discontent; threatening; sullen; foreboding; as, to regard one with black looks.
  • (adv.) Sullenly; threateningly; maliciously; so as to produce blackness.
  • (n.) That which is destitute of light or whiteness; the darkest color, or rather a destitution of all color; as, a cloth has a good black.
  • (n.) A black pigment or dye.
  • (n.) A negro; a person whose skin is of a black color, or shaded with black; esp. a member or descendant of certain African races.
  • (n.) A black garment or dress; as, she wears black
  • (n.) Mourning garments of a black color; funereal drapery.
  • (n.) The part of a thing which is distinguished from the rest by being black.
  • (n.) A stain; a spot; a smooch.
  • (a.) To make black; to blacken; to soil; to sully.
  • (a.) To make black and shining, as boots or a stove, by applying blacking and then polishing with a brush.

Example Sentences:

  • (1) To quantify the size of the lesion in mice, the area of the infarct on the brain surface was assessed planimetrically 48 h after MCA occlusion by transcardial perfusion of carbon black.
  • (2) For male schizophrenics, all symptom differences disappeared except one; blacks were more frequently asocial.
  • (3) The most successful dyes were phenocyanin TC, gallein, fluorone black, alizarin cyanin BB and alizarin blue S. Celestin blue B with an iron mordant is quite successful if properly handled to prevent gelling of solutions.
  • (4) The correlates of three characteristics of familial networks (i.e., residential proximity, family affection, and family contact) were examined among a national sample of older Black Americans.
  • (5) Positivity was not correlated with current residence census tract socioeconomic indicators in black or white females.
  • (6) The high frequency of increased PCV number in San, S.A. Negroes and American Negroes is in keeping with the view that the Khoisan peoples (here represented by the San), the Southern African Negroes and the African ancestors of American Blacks sprang from a common proto-negriform stock.
  • (7) Fluttering in the background was a black flag adorned with white script, the “black flag of jihad”.
  • (8) It is 30 years since Paul Canoville became the first black footballer to play for Chelsea.
  • (9) If black people could only sort out these self-inflicted problems themselves, everything would be OK. After all, doesn't every business say it welcomes job applicants from all backgrounds?
  • (10) A case-control study of breast cancer among Black American women was conducted in seven hospitals in New York City from 1969 to 1975.
  • (11) Mike Enzi of Wyoming A senior senator from Wyoming, Enzi worked for the Department of Interior and the private Black Hills Corporation before being elected to Congress.
  • (12) The Black pregnant teen is a microcosm of the impact of society on the most vulnerable.
  • (13) The charges against Harrison were filed just after two white men were accused of fatally shooting three black people in Tulsa in what prosecutors said were racially motivated attacks.
  • (14) The relative effect of the intramammary infections and of different factors related to the cow (parity, stage of lactation, milk yield) on the individual cell counts, were studied for 30 months on the 62 black-and-white Holstein cows of an experimental herd.
  • (15) Instead, he handed over the opening to reporter Molly Line, who said, “Racial profiling is in the eye of the beholder,” before citing differing perceptions of the phenomenon between white and black people, which is like reading the headline “Rapist, Victim Differ on Consent”.
  • (16) These findings indicate an association between HLA-B7 and ankylosing spondylitis in American blacks and suggest that these patients who lack B27 but possess B7 represent a subgroup of patients with this disease.
  • (17) This is an edited extract from Across the Seas – Australia’s Response to Refugees: A History by Klaus Neumann, published by Black Inc. Books and on-sale now .
  • (18) Of particular note is the difference between Black American and Nigerian figures.
  • (19) They were like some great show, the gas squeezing up from the depths of the oil well to be consumed in flame against the intense black horizon, like some great dragon.
  • (20) Its abuse has become concentrated among post-high school age, black males in a limited number of cities, especially Washington, DC.

Blackhead


Definition:

  • (n.) The scaup duck.

Example Sentences:

  • (1) Sebum excretion rate measurements overlying an open comedone (blackhead) were significantly lower than those obtained from normal skin.
  • (2) The breeds studied in order of increasing susceptibility were Red Masai, Blackhead Persian, Merino, Dorper, Corriedale and Hampshire.
  • (3) There's no mention of belly button fluff either - but blackheads, snot, puke, pus, scabs, tears, smegma, eyelid crumbs, vaginal discharges, menstrual blood and other gunk are all acceptable fodder, especially when dried to a crust under the fingernails.
  • (4) Species examined were the budgerigar, yellow-headed Amazon parrot, canary, halfmoon conure, lesser hill mynah, and blackheaded nun.
  • (5) The proportion of Blackhead Persian genes in South African Karakuls is estimated to be 0.2745, to which a certain degree of gene flow from other fat-tailed sheep has possibly to be added.
  • (6) Puberty and early sexual development were studied in 143 Libyan fat-tailed ram lambs, equally representing Brownhead and Blackhead strains of this breed.
  • (7) Certain other enigmas are mentioned including why some patients have much oil and little acne, and some vice versa; why some blackheads and whiteheads initiate inflammation and suppuration and others not; why cysts and why scars form in some patients and not in others.
  • (8) 25 and 17 Salmonella strains could be isolated from 429 and 423 blackheaded gulls (Larus ridibundus), respectively, during two years of examination.
  • (9) A study was made of the carry-over effect of long photoperiods followed by short photoperiods ou the fattening and gonadal response in a photoperiodic migratory species, the Blackheaded Bunting (Emberiza melanocephala).
  • (10) Gene frequencies at 10 blood polymorphic loci have been used to compare Karakuls from Uzbekistan, Union of Soviet Socialist Republics with South African Karakuls and to evaluate the influence of local Blackhead Persian sheep on the genetic composition of South African Karakuls.
  • (11) Characteristic early lesions in acne vulgaris are the open and closed comedones (blackheads and whiteheads) which are well known to contain a "plug" of cornified material.
  • (12) Albino rats were used to study some remote side effects (total reproduction, embryotoxicity, and teratogenic action) of the Bulgaria Ronidazol-Pharmachim preparation, analogous to the one produced by the firm MS & D--USA (Ridzol 10 per cent water-soluble powder) used in veterinary practice as a prophylactic and therapeutic agent in the case of swine dysentery and turkey blackhead.
  • (13) The existence of various foci of epithelial perforation, manifested clinically by a point hyperkeratosis similar in appearance to blackheads, suggests transfollicular elimination.
  • (14) The two strains did not differ in any of the measured parameters in a consistent way, yet the Brownhead lambs tended to be slightly heavier and to have a slightly larger testis diameter than Blackheads.
  • (15) Comedones (blackheads) were found in apocrine sites in 37, but also in retroauricular sites in 18 and were considered to be an important physical sign for early diagnosis.
  • (16) The results showed high numbers of both groups of bacteria in skin bearing blackheads, papules or pustules and in non-acne adolescent skin.
  • (17) Groups of photosensitive, unstimulated or stimulated, male blackheaded buntings were subjected to photoregimes of 15 hr of green light of three intensities and 9 hr of dark per day.

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