Definition of ectomorphy in US English:

ectomorphy

noun

Physiology
  • See ectomorph

    • ‘Those values in female patients were 159.2 cm, 47.8 kg, and 118.5, respectively, indicating that the male patients showed a higher degree of ectomorphy.’
    • ‘But it will be difficult for those who have a high degree of ectomorphy to achieve a significant increase in their body weight.’
    • ‘Taking into account the levels of tissue components in the men it was calculated that the levels of endomorphy, mesomorphy and ectomorphy in the female contestants amounted to 158%, 68% and 129% respectively.’