(video games) Acronym of Defence of the Ancients

Decline in judgment and other cognitive functions, associated with aging; senility. / Fondness or attentiveness, especially to an excessive degree. / Foolish utterance(s); drivel.

(oncology) The vitamin biotin labelled with radioactive (yttrium-90), used in the treatment of cancer, where it seeks out tumor cells that have been targeted by an antibody linked to streptavidin and kills them.