nudism

名词 nudism:

1. going without clothes as a social practice
   同义词：naturism

nud.ism

n.（名词）
The belief in or practice of going nude, especially in secluded, sexually mixed groups for reasons of health.
裸体主义：信仰或实行裸体，尤指在隐蔽的两性混杂的群体中为了健康的原因

【引伸】
nud.ist
adj.（形容词）
n.（名词）