gregarious

形容词 gregarious:

1. (of animals) tending to form a group with others of the same species
2. instinctively or temperamentally seeking and enjoying the company of others
3. (of plants) growing in groups that are close together

gre.gar.i.ous

adj.（形容词）
Seeking and enjoying the company of others; sociable.See Synonyms at social
合群的，爱交友的：寻觅和喜爱与他人为伴的；爱交友的参见 social
Tending to move in or form a group with others of the same kind:
群居的：有与同类合成一群倾向的：
例句：
gregarious bird species.
群居的鸟类

Botany Growing in groups that are close together but not densely clustered or matted.
【植物学】 聚生的：成群生长但不密集或丛簇生的

来源：
Latin greg3rius [belonging to a flock]
拉丁语 greg3rius [属于一群的]
from grex greg- [flock] * see ger-
源自 grex greg- [一群] *参见 ger-

【引伸】
gregar.iously
adv.（副词）
gregar.iousness
n.（名词）