- totally positive matrix
- totally positive number
- totally projective group
- totally ramified extension
- totally real CR structure
- totally real field
- totally real submanifold
- totally recursive subclass
- totally reflexive relation
- totally regular method
- totally regular ring
- totally regular transformation
- totally sigma-finite measure
- totally singular subspace
- totally stable solution
- totally summable basis
- totally symmetric loop
- totally symmetric polynomial
- totally symmetric quasigroup
- totally symmetric self-complementary plane partition
- totally thin set
- totally transcendental theory
- totally umbilical
- totally umbilical hypersurface
- totally umbilical submanifold