\Fi"broid\, a. [L. fibra a fiber + -oid.] (Med.)
Resembling or forming fibrous tissue; made up of fibers; as,
fibroid tumors. -- n. A fibroid tumor; a fibroma.
{Fibroid degeneration}, a form of degeneration in which
   organs or tissues are converted into fibroid tissue.
{Fibroid phthists}, a form of pulmonary consumption
   associated with the formation of fibrous tissue in the
   lungs, and the gradual atrophy of the lungs, from the
   pressure due to the contraction of this tissue.