RECTILINEALLY

Etymology

Adverb

rectilineally (comparative more rectilineally, superlative most rectilineally)

In a rectilineal fashion.

Source: Wiktionary

RECTILINEAL

Rec`ti*lin"e*al, Rec`ti*lin"e*ar (-ln"*r), a. Etym: [Recti- + lineal, linear.]

Definition: Straight; consisting of a straight line or lines; bounded by straight lines; as, a rectineal angle; a rectilinear figure or course.

– Rec`ti*lin"e*al*ly, adv.

– Rec`ti*lin"e*ar*ly, adv.

Source: Webster’s Unabridged Dictionary 1913 Edition