among botanists, fine strings or thread-like filaments, by which some plants fasten themselves to walls, trees, &c. such as those of ivy.

Cirri, in ichthyology, certain oblong and soft appendages, not unlike little worms, hanging from the under jaws or mouths of some fishes: these cirri, commonly translated beards, afford marks to distinguish the different species of the fishes on which they are found.