Alternately

Al-ter′nate-ly

,

adv.

1.

In reciprocal succession; succeeding by turns; in alternate order.

2.

(Math.)

By alternation; when, in a proportion, the antecedent term is compared with antecedent, and consequent.

,

adv.

In reciprocal succession; by turns, so that each is succeeded by that which it succeeds, as night follows day and day follows night.

alternately ‎(not comparable)

In reciprocal succession; succeeding by turns; in alternate order.
(mathematics) By alternation; when, in a proportion, the antecedent term is compared with antecedent, and consequent.
(proscribed) alternatively

succeding by turns