ETYMOLOGY
from Greek θεσµός (thesmos – law); (from root θε– (to lay down)) + –ϕιλ-ος (-phil ) + -ist
EXAMPLE
“… To shut out any light that may be usefull in Gods house, is with the Jews to make it a denne: as they would do, that would shut out the Ceremonies out of the Church: for, take away Ceremonies out of the Church, and take away the light that is in it. Surely this is spoken in Ceremony, by way of complement to his Bishop, that great Thesmophilist: Have we no other candle in our candlestick but ceremony? …”
From: A Discourse of Proper Sacrifice
By Edward Dering, 1644
Lexicophilia 