燕麦    Oats?

肥胖    obesity?

肥胖症    obesity?

强迫观念(强迫行为)    Obsessive-Compulsive Disorder?

梗阻性黄疸    obstructive jaundice?

阻塞性睡眠呼吸暂停综合症    Obstructive Sleep Apnea?

行业病    occupational disease?

职业病    occupational diseases?

职业性雷诺现象    occupational Raynaud‘s phenomenon?

赭黄症    Ochronosis?

催产素    ocytocin?

办公室环境    office environment?

办公室用品    office equipment?

办公室症候群    office syndrome?

油性皮肤    oily skin?

果糖    oligofructose?

橄榄油    olive oil?

欧米珈-3脂肪酸    Omega-3 fatty acids?

脂肪酸    Omega-3, fatty acid?

洋葱    onion?

独生子女    only child?

甲癣    onychomycosis?

乌龙茶    oolong tea?

开心手术    open heart operation?

慢性青光眼    Open-angle glaucoma?

类阿片    OPIOIDS?

乐观    optimism?

验光师    optomertrist?

口腔癌    oral cancer?

口腔健康    oral Health?

口腔卫生    oral hygiene?

沙宾疫苗    oral poliovirus vaccine?

睾丸切除术    orchiectomy?

器官捐赠    organ donation?

器官捐献    organ donation?

器官捐献者    organ donor?

器官移植    organ transplantation?

有机食品    Organic food?

有机原料    Organic Ingredients?

性高潮    organism?

快感    orgasm?

性高潮缺乏    Orgasmic dysfunction?