Two or more beds or strata of rock united by the occurrence of fossils of the same characteristic species or genera.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "assise" in a sentence
"A top item will be Toulouse-Lautrec's "La Clownesse assise" (1896), a wonderful lithograph of the clown Mademoiselle Cha-U-Kao in a bright-yellow, ruffle top sitting on a red sofa, with legs defiantly stretched wide apart and a skeptical look on her face (estimate: £180,000-£220,000)."
"~~~~~~~~~~~~~French Vocabulary~~~~~~~~~~~~~~~~ dix-huit mois = eighteen months; le dorlotement (m) = pampering; reste assise = don't move ( "stay seated!"); quelle chipie!"
"Femme nue assise by Pablo Picasso (I love Pablo's late period paintings), with an estimate of 8,000,000 – 10,000,000 USD."