Turned half round; half inverted. / (botany, of an ovule) Having the raphe terminating about halfway between the chalaza and the orifice; amphitropous

plural of hemitrope

Half turned round; half inverted; (crystallography) having a twinned structure.

(crystallography) A twin crystal having a hemitropal structure.

Of a crystal: having one part in reverse position with reference to the other part; twinned.

(crystallography) hemitropal. / (mathematics) Invariant relative to a proper orthogonal group.