All articles starting with O

Otolith

Otolith (otoconia): calcium carbonate crystals in the utricle and saccule of the inner ear's vestibular system, detecting linear acceleration and head tilt relative to gravity; distinct from semicircular canals, tested clinically by VEMP, vOCR, and SVV.

Sep 29, 2026

Otolith microchemistry

Otolith microchemistry is an analytical method in fish ecology that measures the elemental composition of otoliths, the ear stones of fish, to reconstruct environmental history and migration.

Otolithes ruber

Otolithes ruber, the tigertooth croaker (basionym Johnius ruber), is a Sciaenidae fish of the Indo-West Pacific, up to 90 cm and 7 kg, commercially fished; IUCN Least Concern but Makran coast and Indian stocks overfished.

Otologic Surgical Procedures

Otologic surgical procedures are operations on the external, middle, or internal ear (MeSH D013506), including tympanoplasty, mastoidectomy, stapes surgery, and cochlear implantation, with endoscopic techniques now established alongside microscopic surgery.

Otological Diagnostic Techniques

Otological diagnostic techniques (MeSH D003939) are methods for diagnosing ear disease and hearing loss: otoscopy, pure-tone and speech audiometry, tuning fork tests, tympanometry, acoustic reflex, otoacoustic emissions, auditory brainstem response, vestibular tests, imaging, and AI-assisted otoscopy.

Oct 15, 2026

Otomat

Otomat, known as Teseo in Italian Navy service, is a long-range, sea-skimming anti-ship missile developed jointly by Italy and France since 1969 and still in production as the TESEO MK2/E.

Otome game

Otome game (乙女ゲーム) is a video game genre for women with female protagonists romancing male characters, starting with Angelique (Koei, 1994); the name spread from Japanese magazines around 2001.

Ōtomo no Fukei

Ōtomo no Fukei (大伴吹負) was a Japanese military commander of the Ōtomo clan who raised troops in Yamato for Prince Ōama during the Jinshin War of 672.

Sep 24, 2026

Ōtomo no Kanamura

Ōtomo no Kanamura (大伴金村) was a magnate of the Yamato court who held the office of ōmuraji, its highest ministerial post, under four emperors from the late fifth century onward.

Ōtomo no Otomaro

Ōtomo no Otomaro was a Japanese commander of the Ōtomo clan who became Seii Taishogun in 794, the first recorded holder of the title later translated as shogun.

Ōtomo no Sakanoue no Iratsume

Ōtomo no Sakanoue no Iratsume (大伴坂上郎女) was a Japanese poet of the Nara period whose 84 poems in the Man'yōshū make her its most represented woman poet.

Ōtomo no Tabito

Ōtomo no Tabito, also read Ōtomo no Sukune Tabito (大伴旅人; 665–731), was a Nara-period Japanese court noble and leading Man'yōshū poet whose 730 Plum Blossom Banquet supplied the source of the Reiwa era name.

Sep 24, 2026

Ōtomo no Yakamochi

Ōtomo no Yakamochi (大伴家持) was a Japanese statesman and waka poet of the Nara period, remembered as the compiler of the Man'yōshū, Japan's earliest poetry anthology.

Sep 24, 2026

Ōtomo Sōrin

Ōtomo Sōrin (大友宗麟), also known as Ōtomo Yoshishige, was a Sengoku-period daimyo and 21st head of the Ōtomo clan who governed six Kyūshū provinces and converted to Christianity in 1578.

Ōtomo–Shimazu conflict

The Ōtomo–Shimazu conflict was a series of Sengoku-period wars in Kyushu between the Ōtomo and Shimazu clans, culminating in the Shimazu victory at Mimikawa in 1578.

Otompan

Otompan, meaning "place of the Otomí," was an Aztec city-state in the Valley of Teotihuacan, on the site of modern Otumba, Mexico, known as a center of craft production.

Otomys

Otomys (vlei rats, laminate-toothed rats), genus of African Muridae rodents named by F. Cuvier in 1824; about 30 species with transverse-crested molars, from mesic grasslands and wetlands of southern, East, and West Africa.

Oton Župančič

Oton Župančič (1878–1949) was a Slovenian poet, dramatist, essayist, and translator, a leading figure of the Slovenian moderna and, with Ivan Cankar, an authority of his generation.

Otonoke (オトノケ)

Otonoke (オトノケ) is a 2024 song by the Japanese hip-hop duo Creepy Nuts, the first opening theme of the anime Dandadan, released on October 4, 2024.

Otopalatodigital syndrome type 1

Otopalatodigital syndrome type 1 (OPD1, Taybi syndrome) is a rare X-linked dominant skeletal dysplasia caused by gain-of-function FLNA mutations, the mildest of the otopalatodigital spectrum, with conductive hearing loss, cleft palate, and characteristic facial and digit anomalies.

Oct 20, 2026

Otopalatodigital syndrome type 2

Otopalatodigital syndrome type 2 (OPD2, Taybi syndrome) is a rare X-linked FLNA gain-of-function skeletal dysplasia with dysmorphic facies, cleft palate, bowed bones, absent halluces, heart and brain malformations, and early death in affected males.

Sep 29, 2026

Otoplasty

Otoplasty is a surgical procedure that reshapes or repositions the external ear, most often to correct prominent ears, usually done at age 5 or 6 under general anesthesia.

Otoraplin

Otoraplin (OTOR, also FDP/MIAL1) is a 16-kDa secreted human protein of the MIA family, encoded at 20p12.1, identified in 2000 as a conserved cochlear gene, homologous to CDRAP/MIA, with cartilage and deafness links.

Otoraplin, SH3 domain

Otoraplin SH3 domain (IPR035554): the SH3-like fold of otoraplin (OTOR, FDP/MIAL1), a 128-aa secreted MIA-family protein of the cochlea; noncanonical, does not bind proline-rich ligands; linked to deafness.

Otorhinolaryngologic Surgical Procedures

Otorhinolaryngologic surgical procedures are operations on the ear, nose, and throat, including the adenoids, tonsils, pharynx, and trachea, classified as MeSH descriptor D013517 under Surgical Procedures, Operative.

Otorhinolaryngology

Otorhinolaryngology (ENT, otolaryngology) is the medical specialty for ear, nose, throat, and head and neck disorders. Distinguished by its otology, rhinology, and laryngology roots, endoscopic and robotic surgery, and a global workforce of 2.19 clinicians per 100,000.