demi

Etymology

From Middle English demi, from Anglo-Norman demi, from Latin dimidius. Literally, “half”.

noun

1. Alternative spelling of demy.
2. (slang) A fifty pence piece.
3. A bottle of wine containing 0.375 liters of fluid, half the volume of a standard bottle; a split.
4. A small glass used chiefly in France (especially for beer) holding 250 mililiters.
   The place was empty save for a big man who was sitting opposite drinking a demi of dark beer. 1928, Jean Rhys, Quartet, Penguin, published 2000, page 34
   A croque-monsieur will set you back €6, a steak €12.50, and a demi of Stella €3. 2012, Time Out Paris, London: Time Out Guides, page 234

adj

1. (informal) Demisexual.
   “… I totally think she's demi.” “What?” “Demisexual? She only likes fucking people she's in love with, whereas I,” Maddie said, moving closer to Jordan, “like fucking anything and anyone. Everyone has such hang-ups about sex, it's like pathetic, you know? We are just, like, totally animals after all, evolved monkeys. I'm all for giving in to my primal instincts.” 2017, Tayari Jones, Atlanta Noir