Miut Hamatzui:

• Insects;
• Muchzak vs. matzui;
• D'oraisah vs d'rabannan;
• Definition.

See seforim by Rabbi Cohen at ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠www.kashrushalacha.com⁠