SHE'ATHED, participle passive 1. Put in a sheath; inclosed or covered in a case; covered; lined; invested with a membrane. 2. adjective In botany, vaginate; invested by a sheath or cylindrical membranaceous tube, which is the base of the leaf, as the stalk or culm in grasses.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI