Source : Webster's Revised Unabridged Dictionary (1913)

Manioc \Ma"ni*oc\, n. [Pg. mandioca, fr. Braz.] (Bot.)
   The tropical plants ({Manihot utilissima}, and {M. Aipi}),
   from which cassava and tapioca are prepared; also, cassava.
   [Written also {mandioc}, {manihoc}, {manihot}.]

Source : WordNet®

manioc
     n 1: a starch made by leaching and drying the root of the cassava
          plant; the source of tapioca; a staple food in the
          tropics [syn: {cassava}, {cassava starch}, {manioca}]
     2: cassava root eaten as a staple food after drying and
        leaching; source of tapioca [syn: {cassava}]
     3: cassava with long tuberous edible roots and soft brittle
        stems; used especially to make cassiri (an intoxicating
        drink) and tapioca [syn: {bitter cassava}, {mandioc}, {mandioca},
         {tapioca plant}, {gari}, {Manihot esculenta}, {Manihot
        utilissima}]