organ/organic/organism
organ/ˈɔ:ɡən/n.［c］1.器官，机体：vocal organs发音器官；the organ of the sense of smell嗅觉器官；the reproductive organs生殖器官2.风琴：play an organ弹风琴；play on the organ用···
organize/organise/organization/organisation
organize/organise/ˈɔ:ɡənaiz/vt.&vi.组织：organize trade unions组织工会The meeting was badly organized.会议组织得很糟。The boss didn’t allow them to organize.老板不允许他们···
orient/oriental
orient/ˈɔ:riənt/ I.n.(the Orient)东方，亚洲(尤指远东)，东半球：in the Orient在东方(诸国)，在(亚洲)远东地区‖II.vt.1.使适应，使熟悉环境：orient oneself to new surroundings使自己适···
orientation
orientation/ˌɔ:rienˈteiʃən/n.［u］1.方向，方位(有时可加不定冠词)：a new orientation in life生活的新方向；political orientation政治方向2.熟悉，适应: New employees must go throu···
origin/original/originality
origin/ˈɔridʒin/n.［c］1.起源，来源，起因（也用pl.）: the origin(s) of civilization文明的发源；the origin of a quarrel吵架的原因；the origin of the Nile尼罗河的来源2.出身，血统(···
originate
originate/əˈridʒineit/vi.&vt.1.起源，发生: The quarrel originated in a misunderstanding.吵架是由于误解引起的。Her book originated in/from a short story.她的书原来是一个短故事···
ornament/ornamental
ornament/ˈɔ:nəmənt/ I.n.1.［c］装饰品，点缀品: a shelf crowded with ornaments摆满装饰品的架子［考句］The Christmas tree was decorated with shining ornaments such as colored lig···
orthodox
orthodox/ˈɔ:θədɔks/adj.1.传统的，符合社会风俗的：orthodox idea传统观念2.正统的：The Orthodox Church东正教；orthodox believers信奉正教的人
