acris
Found Acris with different capitalization.
Acris neuter dative plural, feminine dative plural, neuter ablative plural, feminine ablative plural of acra
ācris, v. acer 2.
Acra, in Chartulario Gemeticensi tom. 1. pag. 264. 267 :
Huic
ergo cessioni meæ ado (pro addo) et duas Acres prati.