embouchure
- n the aperture of a wind instrument into which the player blows directly
elusiveness
- n the quality of being difficult to grasp or pin down
the author's elusiveness may at times be construed as evasiveness
elution
- n the process of extracting one material from another by washing with a solvent to remove adsorbed material from an adsorbent (as in washing of loaded ion-exchange resins to remove captured ions); used to obtain uranium ions