NATURISM
nudism, naturism
(noun) going without clothes as a social practice
Source: WordNet® 3.1
Etymology
Noun
naturism (countable and uncountable, plural naturisms)
The belief in or practice of going nude in social settings, often in mixed-gender groups, specifically either in cultures where this is not the norm or for health reasons.
The worship of the powers of nature.
Synonyms
• (going nude in social settings): nudism
Anagrams
• Sturmian, Turanism
Source: Wiktionary
Na"tur*ism, n. (Med.)
Definition: The belief or doctrine that attributes everything to nature as
a sanative agent.
Source: Webster’s Unabridged Dictionary 1913 Edition