planar

Synonyms:

two-dimensional

coplanar

lying in the same plane

flat

having a relatively broad surface in relation to depth or thickness

placoid, platelike

as the hard flattened scales of e.g. sharks

flattened, planate

having been flattened

tabular

flat; like a table in form

Antonyms:

cubic, three-dimensional

having three dimensions

linear, one-dimensional

of or in or along or relating to a line; involving a single dimension

blockish, blocky

resembling a block in shape

box-shaped, boxlike, boxy

resembling a box in rectangularity

brick-shaped

shaped like a brick

cube-shaped, cubelike, cubical, cubiform, cuboid, cuboidal

shaped like a cube

isometric

of a crystal system characterized by three equal axes at right angles

solid

having three dimensions

collinear

lying on the same line

lineal

arranged in a line

linelike

resembling a line

rectilineal, rectilinear

characterized by a straight line or lines

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