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Deutan: (6% of males): lacking, or possessing anomalous M-opsins for medium-wavelength-sensitive cone cells. Despite often being called red-blind and green-blind respectively, protan and deutan varieties have very similar phenotypes (color vision), especially when compared to tritan color blindness.
The most common form is caused by a genetic condition called congenital red–green color blindness (including protan and deutan types), which affects up to 1 in 12 males (8%) and 1 in 200 females (0.5%). [3] The condition is more prevalent in males, because the opsin genes responsible are located on the X chromosome. [2]
This is a comparison of English dictionaries, which are dictionaries about the language of English.The dictionaries listed here are categorized into "full-size" dictionaries (which extensively cover the language, and are targeted to native speakers), "collegiate" (which are smaller, and often contain other biographical or geographical information useful to college students), and "learner's ...
Some usages identified as American English are common in British English; e.g., disk for disc. A few listed words are more different words than different spellings: "aeroplane/airplane", "mum/mom". See also: American and British English differences, Wikipedia:List of common misspellings and Wikipedia:Manual of Style#National varieties of English
Oxford English Dictionary, Second Edition Oxford Dictionary has 273,000 headwords; 171,476 of them being in current use, 47,156 being obsolete words and around 9,500 derivative words included as subentries. The dictionary contains 157,000 combinations and derivatives, and 169,000 phrases and combinations, making a total of over 600,000 word-forms.
Color blindness can be classified by the cone cell that is affected (protan, deutan, tritan) or by the opponent channel that is affected (red–green or blue–yellow). In either case, the channel can either be inactive (in the case of dichromacy) or have a lower dynamic range (in the case of anomalous trichromacy).
In January 2018, a "Similar-sounding words" feature was added to the English dictionary which highlights words that sound similar such as "aesthetic" and "ascetic", "pray" and "prey", "conscientious" and "conscious" etc. [20] "Google Word Coach" vocabulary game was made available along with dictionary searches and as a separate game on mobile ...
The Longman Dictionary of Contemporary English (LDOCE), first published by Longman in 1978, [1] is an advanced learner's dictionary, providing definitions using a restricted vocabulary, helping non-native English speakers understand meanings easily. It is available in four configurations: