WordNet

sound loudly and sonorously; "the bells rang" (同)peal
a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke" (同)halo, annulus, doughnut, anchor ring
jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger; "she had rings on every finger"; "he noted that she wore a wedding band" (同)band
a characteristic sound; "it has the ring of sincerity"
a platform usually marked off by ropes in which contestants box or wrestle
the sound of a bell ringing; "the distinctive ring of the church bell"; "the ringing of the telephone"; "the tintinnabulation that so voluminously swells from the ringing and the dinging of the bells"--E. A. Poe (同)ringing, tintinnabulation
attach a ring to the foot of, in order to identify; "ring birds"; "band the geese to observe their migratory patterns" (同)band
make (bells) ring, often for the purposes of musical edification; "Ring the bells"; "My uncle rings every Sunday at the local church" (同)knell
wearing a wedding ring; lawfully married; "a ringed wife"- Tennyson
having colored rings around the body
gymnastic apparatus consisting of a pair of heavy metal circles (usually covered with leather) suspended by ropes; used for gymnastic exercises; "the rings require a strong upper body"
an isolated area of diminished vision within the visual field
the giving of a ring as a token of engagement

PrepTutorEJDIC

『指輪』 / 『輪』,環;輪形,円形 / (円形の)サーカス演技場,公演場,競技場;(ボクシング・レスリングの)リング / 《複数形で》(体操の)つり輪 / (不法な目的で結託した)(…の)徒党,一味《+『of』+『名』》 / (原子の)環 / …を円形に取り囲む,円で囲む《+『about』(『around』,《英》『round』)+『名,』+『名』+『about』(『around』,《英》『round』)+『名』》 / 〈動物〉‘に'鼻輪(首輪,足輪)をはめる / (遊びで)…‘に'輪を投げる / 環状に動く,輪を描く
〈鐘・ベルなどが〉『鳴る』 / 《『ring』+『形』〈補〉》(…のように)聞こえる / (…を)ベルを鳴らして求める《+『for』+『名』》 / 〈音声・楽器などが〉鳴り響く;〈場所が〉(音などで)満ちる《+『with』+『名』》 / 耳鳴りがする / 〈鐘・ベルなど〉‘を'『鳴らす』 / 〈人〉‘を'(鐘などを)『鳴らして呼ぶ』;…‘を'鐘を鳴らして知らせる / 《英》…‘に'電話をかける《+『up』+『名』,+『名』+『up』》 / 《単数形で》(鐘・ベルなどの)『鳴る音,響き』《+『of』+『名』》 / 鐘(ベルなど)を鳴らすこと;ベル(など)が鳴ること / 《単数形で》(…の)固有の響き,調子,感じ《+『of』+『名』》 / 《話》電話をかけること
輪にある;環状の / 指輪をはめた

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Balarabe AH1, Biswas J.
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PMID 24724910

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Pan BX1, Yee KM2, Ross-Cisneros FN3, Sadun AA4, Sebag J5.
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PMID 25237158

Makiyama Yukiko,Kikuchi Takanobu,Otani Atsushi,Oishi Akio,Guo Congrong,Nakagawa Satoko,Ogino Ken,Kojima Hiroshi,Kurimoto Masafumi,Yoshimura Nagahisa
Investigative ophthalmology & visual science 54(8), 5424-5431, 2013-08
… Goldmann perimetry revealed island, ring-shaped, concentric, or central scotoma. …
NAID 120005439186

リンク元	「輪状暗点」「centrocecal scotoma」
関連記事	「ring」

網膜色素変性症：本性では桿体細胞から冒されるが、同細胞は視野の20-30°に多いため輪状暗点を呈する。
緑内障：ブエルム暗点とは、マリオット盲点の上方または下方から10-20°の範囲で鼻側に向かう暗点であり緑内障に特徴的である。これは弓状暗点とも呼ばれる。上下の暗点が鼻側で繋がれば輪状暗点として認識される。