- atomic number 85
Contraction of that.
Other Word Forms of At
Idioms, Phrasal Verbs Related to At
Origin of At
From Middle English at, from Old English æt (“at, near, by, toward”), from Proto-Germanic *at (“at, near, to”), from Proto-Indo-European *ád (“near, at”). Cognate with Scots at (“at”), North Frisian äät, äit, et, it (“at”), Danish at (“to”), Faroese at (“at, to, toward”), Norwegian åt (“to”), Swedish åt (“for, toward”), Icelandic að (“to, towards”), Gothic (at, “at”), Latin ad (“to , near”).
Middle English from Old English æt ad- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition