- total dominating number
- total dominating partition number
- total dominating set
- total dual integrality
- total e-degree
- total increment
- total inspection
- total lateral face of a frustum
- total lateral of a cone
- total left (right) ring of fractions
- totally absolute curvature
- totally balanced hypergraph
- totally bounded metric space
- totally bounded set
- totally bounded set
- totally bounded uniform space
- maximal X-code
- maximal δ-filter
- maximal π-base
- maximum almost disjoint family
- maximum clique problem
- maximum condition for rings
- maximum condition on a module
- maximum distance separable code
- maximum edge independent set