acrylic fiber(n = noun.substance) acrylic - polymerized from acrylonitrile;
is a kind of man-made fiber, synthetic fiber

acrylic, acrylic acid, acrylic paint, acrylic resin, animal fiber, bast fiber, castor fiber, cotton fiber, fiber, fiber bundle, fiber optic cable, fiber optics, glass fiber, man-made fiber, medullated nerve fiber, motor nerve fiber, muscle fiber, myelinated nerve fiber, natural fiber, nerve fiber, optical fiber, plant fiber, polyester fiber, purkinje fiber, staple fiber, striated muscle fiber, synthetic fiber, tampico fiber, vulcanized fiber