fraternal

形容词 fraternal:

1. of or relating to a fraternity or society of usually men
2. (of twins) derived from two separate fertilized ova
   同义词：biovular
3. like or characteristic of or befitting a brother
   同义词：brotherly, brotherlike

1. A close fraternal tie.
   亲密的兄弟情谊
2. An organization of people united by a common fraternal bond or social aim.
   兄弟会由共同的兄弟情谊或社会目的而结合起来的民间组织
3. The party sent its fraternal greetings to the trade union meeting.
   党向工会大会致以亲切的问候。

fra.ter.nal

adj.（形容词）

Of or relating to brothers:
兄弟的：属于或关于兄弟的：
例句：
a close fraternal tie.
亲密的兄弟情谊

Showing comradeship; brotherly.
显出同志之谊的；兄弟的
Of or constituting a fraternity:
兄弟的：属于或组成兄弟的：
例句：
a fraternal association.
兄弟会的社团

Biology Of, relating to, or being a twin developed from two separately fertilized ova; dizygotic.
【生物学】 异卵双生的：由两个分别受精的卵子生出的双胞胎的；由两个卵生出来的相象的人或物

来源：
Middle English
中古英语
from Old French fraternel
源自 古法语 fraternel
from Medieval Latin fr3tern3lis
源自 中世纪拉丁语 fr3tern3lis
from Latin fr3ternus
源自 拉丁语 fr3ternus
from fr3ter [brother] * see bhr3ter-
源自 fr3ter [兄弟] *参见 bhr3ter-

【引伸】
frater.nalism
n.（名词）
frater.nally
adv.（副词）