l-sel] 
| a protein produced or derived from the culture of a single-celled organism, used as a food supplement or substitute. Abbreviation: SCP |
| sin·gle-cell protein (sĭng'gəl-sěl') n. Abbr. SCP A protein extracted from cultured algae, yeasts, or bacteria and used as a substitute for protein-rich foods, especially in animal feeds. |