expansible

However absurd the cereal wars may appear, Roth says he is simply trying to act before the really big guys muscle in on his highly expansible idea.

From Time Magazine Archive

Genital tuft: in Lepidoptera; an expansible tuft of fine hair believed to be scent-producing.

From Explanation of Terms Used in Entomology by John. B. Smith

Of the founders of the lasting and expansible theories of natural science, it may be said, that "thoughts beyond their thoughts to those high bards were given."

From The Story of Alchemy and the Beginnings of Chemistry by M. M. Pattison Muir

The faculty is inseparable from man's consciousness of immortality and of an indefinitely expansible nature which ever makes him discontented with the present.

From Expositions of Holy Scripture Second Kings Chapters VIII to End and Chronicles, Ezra, and Nehemiah. Esther, Job, Proverbs, and Ecclesiastes by Alexander Maclaren

First dealing with temperature as measured by the expansion of a liquid in a less expansible vessel, he showed how it is in reality numerically reckoned.

From Lord Kelvin An account of his scientific life and work by Andrew Gray