The Collaborative International Dictionary
Fistuliform
Fistuliform \Fis"tu*li*form\ (? or ?), a. [Fistula + -form.] Of a fistular form; tubular; pipe-shaped.
Stalactite often occurs fistuliform.
--W. Philips.
Wiktionary
fistuliform
a. Of a fistular form; tubular; pipe-shaped.