cat·er-cor·nered 
(kătər-kôr′nərd, kătē-) also cat·er-cor·ner (-nər) or cat·ty-cor·nered or cat·ty-cor·ner (kătē-) or kit·ty-cor·nered or kit·ty-cor·ner (kĭtē-)
(kătər-kôr′nərd, kătē-) also cat·er-cor·ner (-nər) or cat·ty-cor·nered or cat·ty-cor·ner (kătē-) or kit·ty-cor·nered or kit·ty-cor·ner (kĭtē-)adj.
Diagonal.
adv.
In a diagonal position.
[From obsolete cater, four at dice, from Middle English, from Old French catre, four, from Latin quattuor; see kwetwer- in the Appendix of Indo-European roots.]