: having the longer axis more or less vertical compare plagiotropic
: being, having, or relating to properties (such as strength, stiffness, and elasticity) that are symmetric about two or three mutually perpendicular planes
a piece of straight-grained wood is an orthotropic material
of a bridge
: designed so that the roadway serves as an orthotropic structural member : constructed with a steel-plate deck as an integral part of the support structure
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