| pheno- or phen- pref. 1. Showing; displaying: phenotype. 2. a. Related to or derived from benzene: phenol. b. Containing phenyl: phenothiazine. [Greek phaino-, from phainein, to show; see bh  -1 in Indo-European roots.] |
pheno- before a vowel, phen-
combining form
1. showing or manifesting phenotype
2. (Chemistry) indicating that a molecule contains benzene rings phenobarbital
[from Greek phaino- shining, from phainein to show; its use in a chemical sense is exemplified in phenol, so called because originally prepared from illuminating gas]
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