uniloculate
/ˌjuːnɪˈlɒkjʊlət/ /ˌjuːnɪˈlɒkjʊleɪt/adjective
Having one loculus or cavity; = unilocular.
Origin
Mid 19th century; earliest use found in New York Farmer. From uni- + loculate (although this is first attested slightly later). Compare post-classical Latin uniloculatus.