pheo-

pheo-

1. Prefix denoting the same substituents on a phorbin or phorbide (porphyrin) residue as are present in chlorophyll, excluding any ester residues and Mg.
2. Combining form meaning gray, dark-colored.

pheo-, phao-

prefix meaning "dusky": pheochrome, pheochromoblast, pheophytin.

pheo-

1. Prefix denoting the same substituents on a phorbin or phorbide (porphyrin) residue as are present in chlorophyll, excluding any ester residues and Mg.
2. Combining form meaning gray, dark-colored.
Synonym(s): phaeo-.
[G. phaios, dusky]

pheo-

a combining form meaning brown, dun or dusky.
References in periodicals archive ?
Results showed that pheomelanin contents were highest in human "fire red" hair, and eumelanin was highest in black, gray and golden human hair; while in yellow mouse hair, pheomelanin contents were higher (Gregory, 1996); in yellow-brown, brown and red sheep, eu- and pheo- melanins were higher (Aliev et al.