sabbatarian
Concise Oxford English Dictionary © 2008 Oxford University Press:
sabbatarian /ˌsabəˈtɛːrɪən/
▶noun a strict observer of the sabbath. ▶adjective relating to or upholding the observance of the sabbath.
– derivatives
sabbatarianism noun.
sabbatarianism noun.
'sabbatarian' also found in these Oxford entries:

