monaxial
Mo*nax"i*al, a. Etym: [Mon- + axial.] (Biol.) Defn: Having only one axis; developing along a single line or plane; as, monaxial development.
Mo*nax"i*al, a. Etym: [Mon- + axial.] (Biol.) Defn: Having only one axis; developing along a single line or plane; as, monaxial development.