How to say "cortex" in Japanese

• 皮質ひしつCommon
  nounThe common word for 'cortex', used especially for the anatomical sense — the outer layer of an organ such as the brain. This is the term to reach for in medical and scientific contexts.
• 皮層ひそう
  no-adjectiveA less common counterpart of 皮質 as a translation of 'cortex'. For most purposes this is seldom the word you want; use 皮質 unless the text you are reading itself uses 皮層.

For 'cortex' in the anatomical sense — the outer layer of organs such as the brain — use 皮質, the common word; 皮層 translates the same English word but is less common and seldom the one you need.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 皮質ひしつcortex
• 皮層ひそうcortex