FOCALLY

focally

(adverb) in a focal manner; “the submucosa was focally infiltrated”

Source: WordNet® 3.1

Etymology

Adverb

focally (comparative more focally, superlative most focally)

With respect to a focus

Source: Wiktionary

FOCAL

Fo"cal, a. Etym: [Cf.F. focal. See Focus.]

Definition: Belonging to,or concerning, a focus; as, a focal point. Focal distance, or length,of a lens or mirror (Opt.), the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center. --Focal distance of a telescope, the distance of the image of an object from the object glass.

Source: Webster’s Unabridged Dictionary 1913 Edition