1. having an abnormally large head relative to body size
Usage: medical/scientific term; also spelled macrocephalic
2. in zoology, having a head that is disproportionately large compared to the body
Usage: zoological/biological term

Examples

• The infant was diagnosed as macrocephalous after measurements showed an unusually large head circumference.
• Certain fish species are naturally macrocephalous, with heads comprising a significant portion of their total body length.
• The doctor noted that the patient's macrocephalous condition required ongoing neurological monitoring.
• Some macrocephalous insects have evolved enlarged heads to accommodate larger sensory organs.
• The macrocephalous appearance of the newborn prompted further genetic testing.