Their horns are unusual in that they consist of a central bone core and an outerkeratinous casing which is shed annually.
keratinous in American English
(kəˈrætnəs)
adjective
composed of or resembling keratin; horny
Word origin
[1895–1900; keratin + -ous]This word is first recorded in the period 1895–1900. Other words that entered Englishat around the same time include: apothecaries' measure, backwind, cutback, freewheel, hit-and-run-ous is a suffix forming adjectives that have the general sense “possessing, full of”a given quality (covetous; glorious; nervous; wondrous); -ous and its variant -ious have often been used to Anglicize Latin adjectives with terminations that cannotbe directly adapted into English (atrocious; contiguous; garrulous; obvious; stupendous). As an adjective-forming suffix of neutral value, it regularly Anglicizes Greekand Latin adjectives derived without suffix from nouns and verbs; many such formationsare productive combining forms in English, sometimes with a corresponding nominalcombining form that has no suffix (as -fer and -ferous; -phore and -phorous; -pter and -pterous; -vore and -vorous)
Examples of 'keratinous' in a sentence
keratinous
Ornithomimosaur dinosaurs evolved lightweight, edentulous skulls that possessed keratinous rhamphothecae.
Andrew R. Cuff, Emily J. Rayfield 2015, 'Retrodeformation and muscular reconstruction of ornithomimosaurian dinosaur crania',PeerJhttps://peerj.com/articles/1093.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Reports on keratinous cysts involving the tarsal plate are very rare.
Melis Palamar Onay, Ayşe Yağcı, Taner Akalın 2013, 'Giant Tarsal Keratinous Cyst Mimicking Chalazion', Türk Oftalmoloji Dergisihttp://www.oftalmoloji.org/article_2254/Giant-Tarsal-Keratinous-Cyst-Mimicking-Chalazion. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The dermis showed a linear array of keratinous cysts with intervening diffuse lymphohistiocytic infiltrate.
B Vijaya, S R Narahari, Pallavi Deka, G V Manjunath 2016, 'Pretibial dystrophic epidermolysis bullosa pruriginosa: A rare case report in a childwith low intelligent quotient', Indian Journal of Paediatric Dermatologyhttp://www.ijpd.in/article.asp?issn=2319-7250;year=2016;volume=17;issue=1;spage=32;epage=34;aulast=Vijaya. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
On histopathology, it shows crater-like invaginations filled with keratinous materialand evidence of dyskeratosis.
Raghu Ram Maddala, Ashok Ghorpade, Mercy Polavarpu, Satish A Adulkar, Manbendra Das 2016, 'Familial dyskeratotic comedones: A rare entity', Indian Dermatology Online Journalhttp://www.idoj.in/article.asp?issn=2229-5178;year=2016;volume=7;issue=1;spage=46;epage=48;aulast=Maddala. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Keratinous waste mainly emanates from poultry and leather industries, thereby severely contaminating the environment.
Yu-Ze Dong, Wen-Shous Chang, Po Ting Chen 2017, 'Characterization and overexpression of a novel keratinase from Bacillus polyfermenticusB4 in recombinant Bacillus subtilis', Bioresources and Bioprocessinghttp://link.springer.com/article/10.1186/s40643-017-0177-1. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The hydrolyzed keratinous material can also be utilized as the source of fertilizers for plants and feed for animals.
Tarun Kumar Kumawat, Anima Sharma, Seema Bhadauria 2017, 'Chrysosporium queenslandicum: a potent keratinophilic fungus for keratinous wastedegradation', International Journal of Recycling of Organic Waste in Agriculturehttp://link.springer.com/article/10.1007/s40093-017-0162-x. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The outer surface of mass lesion was lined with urothelia and squamous epithelia, containing keratinous materials.
Jai Hyang Go, Jeong Hee Hong, Gilho Lee 2012, 'Atypical Epidermoid Cyst in Renal Pelvis and Histogenetic Implications', International Neurourology Journalhttp://www.einj.org/upload/pdf/inj-16-4-205-9.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Histology of the excised tissue revealed keratinous cysts that were diffusely distributed with inflammatory granulation tissue.
Nao Wakabayashi, MD, Mamiko Tosa, MD, PhD, Shinichi Anzai, MD, PhD, Rei Ogawa, MD,PhD, FACS 2018, 'Pyoderma Gangrenosum Secondary to Severe Congenital Neutropenia', Plastic and Reconstructive Surgery, Global Openhttp://journals.lww.com/prsgo/fulltext/10.1097/GOX.0000000000001676. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Histology shows invagination of the epidermis with a lamellar keratinous plug and focal evidence of dyskeratosis.
Kumaran M, Appachu Divya, Jayaseelan Elizabeth 2008, 'Familial dyskeratotic comedones', Indian Journal of Dermatology, Venereology and Leprologyhttp://www.ijdvl.com/article.asp?issn=0378-6323;year=2008;volume=74;issue=2;spage=142;epage=144;aulast=Kumaran. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)