The Collaborative International Dictionary of English v.0.48:

Athetize \Ath"e*tize\, v. t. [imp. & p. p. Athetized; p. pr. &
   vb. n. Athetizing.] [Gr. ?, fr. ? set aside, not fixed; ?
   not + ? to place.]
   To set aside or reject as spurious, as by marking with an
   obelus.
   [Webster 1913 Suppl.]