The Collaborative International Dictionary
Dichotomously
Dichotomous \Di*chot"o*mous\, a. [L. dichotomos, Gr. ?; ? in two, asunder + diate`mnein to cut.] Regularly dividing by pairs from bottom to top; as, a dichotomous stem. -- Di*chot"o*mous*ly, adv.
Wiktionary
dichotomously
adv. In a dichotomous manner
WordNet
dichotomously
adv. in a dichotomous manner