Seshadri Constant: Algebraic Geometry, Ample Line Bundle, Variety

Conic Bundle: Algebraic Geometry, Variety, Severi Brauer Surface

Motive (algebraic geometry): Algebraic Geometry, Variety, Cohomology Theory

Regular Map (algebraic geometry): Algebraic Geometry, Variety, Subvarieties

Normal Crossings: Algebraic Geometry, Divisor (algebraic geometry), Variety