1. The outer layer of protoplasm in certain protozoans, especially in sarcodines; the ectoplasm.
Usage: biology; technical; rare

Examples

• The ectosarc of the amoeba is responsible for forming pseudopodia.
• Under the microscope, the ectosarc appeared as a thin, transparent outer layer.
• The ectosarc differs from the inner endosarc in its structural properties.
• Protozoologists study the ectosarc to understand protozoan locomotion.