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Primitive.

• Primitive polynomial (in the sense of finite field theory, namely minimal polynomial of field generator)
• Primitive polynomial (in the sense of ring theory, namely gcd of coefficients is 1)
• Primitive element (and primitive extension)
• Primitive function (antiderivative)
• Primitive permutation group (no non-trivial equivalence relation preserved)
• Primitive polytope (rarely used, I think).
• (left) Primitive ring
• Primitive recursion (in logic and complexity theory)
2 added 83 characters in body

Primitive.

• Primitive polynomial (in the sense of finite field theory, namely minimal polynomial of field generator)
• Primitive polynomial (in the sense of ring theory, namely gcd of coefficients is 1)
• Primitive element (and primitive extension)
• Primitive function (antiderivative)
• Primitive permutation group (no non-trivial equivalence relation preserved)
• Primitive polytope (rarely used, I think).
• (left) Primitive ring