Source : Webster's Revised Unabridged Dictionary (1913)

Obstruent \Ob"stru*ent\, a. [L. obstruens, p. pr. of obstruere.
   See {Obstruct}.]
   Causing obstruction; blocking up; hindering; as, an obstruent
   medicine. --Johnson.

Obstruent \Ob"stru*ent\, n.
   Anything that obstructs or closes a passage; esp., that which
   obstructs natural passages in the body; as, a medicine which
   acts as an obstruent.