caseless1
/ˈkeɪslɪs/adjective
1 Grammar. That has no case; morphologically unmarked; uninflected.
2Characterized by a lack of court cases; (of a lawyer) without a case to work on, idle.
Origin
Early 19th century; earliest use found in Samuel Taylor Coleridge (1772–1834), poet, critic, and philosopher. From case + -less.
caseless2
/ˈkeɪslɪs/adjective
1Not enclosed in or having a case; (especially of a clock or other manufactured object) lacking an outer protective or covering case.
2Of ammunition: that does not have or need a cartridge to hold charge and bullet together; (of a firearm) using such ammunition.
Origin
Mid 19th century; earliest use found in Richmond (Indiana) Palladium. From case + -less.