Possibly fromLatinfistulōsus(“pipe-shaped, hole-filled, fistulous”), or a English medical pseudo-Latinism viafistula +‎-ous.

fistulous (comparativemorefistulous,superlativemostfistulous)

1. Of or pertaining to afistula.

   Synonym:syringoid

2. Resembling areed;hollow andtubular

• fistulous withers

• English terms derived from Latin
• English terms suffixed with -ous
• English lemmas
• English adjectives

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