1. a person with a lean and delicate body build
Usage: psychology; body type classification

Examples

• As an ectomorph, she found it difficult to gain weight despite eating large meals.
• The fitness trainer explained that ectomorphs typically have fast metabolisms.
• Many basketball players are ectomorphs with their tall, slender frames.
• He was a classic ectomorph with narrow shoulders and long limbs.
• Ectomorphs often struggle to build muscle mass compared to other body types.
• The study classified participants as ectomorphs, mesomorphs, or endomorphs.