Wiktionary
free-form
a. Having an unconventional, variable or asymmetric form.
Usage examples of "free-form".
Free-form seats and couchesapparently made of natural woodfurnished a sunken conversation pit near a broad, one-piece window that stretched at least twenty meters to the ceiling.
Ralph, however, preferred reading to free-form thinking, and he soon became interested in the promise of Pewamo, Tomorrow’s Playland.