noun, noun which may take the genitive case particle 'no'
medium grade; middle class; secondary
Used for ranking, quality, or level that is neither high nor low. Common in educational contexts (e.g., 中等教育 'secondary education') and grading (e.g., 中等品 'medium-grade goods').
This school focuses on secondary education.
This tea is of medium quality.
secondary school
secondary school teacher