RichThesaurus
curvilinear
vs
encircling
curvilinear
adj
Formed by curved lines.
Having bends; curved; curvilineal.
encircling
adj
enclosing, skirting
noun
encirclement
How often have the words
curvilinear
and
encircling
occurred in a corpus of books?
(source:
Google Ngram Viewer
)