Acting by turns; alternate.

In crystallography, exhibiting on two parts, an upper and a lower, faces which alternate among themselves, but which, when the two parts are compared, correspond with each other.

adjective. Acting by turns; alternate.

adjective. a second side made base, in distinction from a side previously regarded as base.

adjective. Acting by turns; alternate.

"The old principle that economists as economists would not recommend the value judgments used to choose altern..."

altern base  

alternate