Source : Webster's Revised Unabridged Dictionary (1913)

Setwall \Set"wall`\, n. [CF. {Cetewale}.] (Bot.)
   A plant formerly valued for its restorative qualities
   ({Valeriana officinalis}, or {V. Pyrenaica}). [Obs.] [Written
   also {setwal}.] --Chaucer.

Source : WordNet®

Valeriana officinalis
     n : tall rhizomatous plant having very fragrant flowers and
         rhizomes used medicinally [syn: {common valerian}, {garden
         heliotrope}]