名詞 co-:

1. an odorless very poisonous gas that is a product of incomplete combustion of carbon
   同義詞：carbon monoxide, carbon monoxide gas, CO
2. a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
   同義詞：cobalt, Co, atomic number 27
3. one who refuses to serve in the armed forces on grounds of conscience
   同義詞：conscientious objector, CO
4. a state in west central United States in the Rocky Mountains
   同義詞：Colorado, Centennial State, CO

co-
pref.（前綴）
Together; joint; jointly; mutually:
共同；連接；聯(lián)合地；相互地：
例句：
coeducation.
男女同校

Partner or associate in an activity:
同伴：某項活動的合作者或合伙人：
例句：
coauthor; cofounder.
合著者；共同創(chuàng)立者

Subordinate or assistant:
部屬，助手：
例句：
copilot.
副駕駛員

To the same extent or degree:
達(dá)到相同范圍或程度：
例句：
coextensive.
共同擴張的

Complement of an angle:
余角：
例句：
cotangent.
余切

來源：
Middle English
中古英語
from Latin
源自 拉丁語
variant of com- [com-]
com-的變體 [前綴，表.與，和.]