Ob*ten`e*bra"tion (?), n. [L. obtenebrate to make dark.] The act of
darkening; the state of being darkened; darkness. [Obs.]
In every megrim or vertigo, there is an obtenebration joined with a
semblance of turning round.
Bacon.
Ob*ten"sion (?), n. [L. obtentio. See Obtend.] The act of obtending.
[Obs.] Johnson.
Ob*test" (?), v. t. [imp. & p. p. Obtested; p. pr. & vb. n. Obtesting.]
[L. obtestari; ob (see Ob-) + testari to witness, fr. testis a
witness.] 1. To call to witness; to invoke as a witness. [R.] Dryden.