Ob-

A prefix that indicates reversal of the usual orientation, e.g. oblanceolate means widening gradually from the pointed base to a maximum near the apex, which may be more or less rounded.
Found on http://www.encyclo.co.uk/local/20901

Ob-

Ob- [ Latin ob , preposition Confer 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, ovate.
Found on http://www.encyclo.co.uk/webster/O/1

Ob-

• 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, ovate. Ob- is commonly assimilated before c, f, g, and p, to oc-, of-, og-, and op-.
Found on http://thinkexist.com/dictionary/meaning/ob-/

Ob-

A prefix meaning in a reversed direction, usually in reference to shape.
Found on http://www.npwrc.usgs.gov/resource/plants/vascplnt/glossary.htm

Ob-

prefix signifying inversion or reversal of normal direction
Found on http://www.encyclo.co.uk/local/21767

ob-

inversely; usually same shape as suffix but attached by the narrower end, for example obcordate, oblanceolate, obovate.
Found on http://en.wikipedia.org/wiki/Glossary_of_botanical_terms

ob-

prefix meaning inversely or opposite to
Found on http://florabase.dpaw.wa.gov.au/help/glossary

Ob-

A Latin syllable, usually signifying inversion.
Found on http://www.gardenology.org/wiki/Glossary_of_Gardening_Terms
No exact match found