conventicle
noun
a secret or unauthorized meeting, especially for religious worship, as those held by Protestant dissenters in England in the 16th and 17th centuries.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
I heard Narcisse laugh—laugh as he talked of the cries of the poor creatures in the conventicler.
From The Chaplet of Pearls by Charlotte Mary Yonge