[ L. ob, prep. Cf. Epi-. ] A prefix signifying to, toward, before, against, reversely, etc.; also, as a simple intensive; as in oblige, to bind to; obstacle, something standing before; object, lit., to throw against; obovate, reversely, or oppositely, ovate. Ob- is commonly assimilated before c, f, g, and p, to oc-, of-, og-, and op-. [ 1913 Webster ]

a. [ Pref. ob- + compressed. ] Compressed or flattened antero-posteriorly, or in a way opposite to the usual one. [ 1913 Webster ]

{ } a. [ Pref. ob- + conic, conical. ] Conical, but having the apex downward; inversely conical. [ 1913 Webster ]

a. [ Pref. ob- + cordate. ] Heart-shaped, with the attachment at the pointed end; inversely cordate; as, an obcordate petal or leaf. [ 1913 Webster ]

a. [ Pref. ob- + diplostemonous. ] (Bot.) Having twice as many stamens as petals, those of the outer set being opposite the petals; -- said of flowers. Gray. [ 1913 Webster ]

n. (Bot.) The condition of being obdiplostemonous. [ 1913 Webster ]

n. [ L. obdormire to fall asleep. ] Sleep. [ Obs. ] Bp. Hall. [ 1913 Webster ]

v. t. [ L. obducere, obductum; ob (see Ob-) + ducere to lead. ] To draw over, as a covering. [ Obs. ] Sir M. Hale. [ 1913 Webster ]

v. t. [ See Obduce. ] To draw over; to cover. [ Obs. ] Sir T. Browne. [ 1913 Webster ]

n. [ L. obductio. ] The act of drawing or laying over, as a covering. [ Obs. ] [ 1913 Webster ]