subtend

1. (transitive, mathematics) To use an angle to delimit (mark off, enclose) part of a straight or curved line, for example an arc or the opposite side of a triangle.Examples: "A 43° angle subtends an arc of about 0.75 meters on a circle with a radius of 1 meter."transitive

2. (transitive, also mathematics) To extend or stretch opposite something; to be part of a straight or curved line that is opposite to and delimits an angle.Examples: "A hypotenuse subtends the right angle of a right triangle."; "An arc measuring about 0.75 meters on a circle with a radius of 1 meter subtends an angle of about 43°."; "[…] trillions of bacteria, each equally an individual, which are found in a person’s gut, his mouth, his scalp, his skin and all of the crevices and orifices that subtend from his body’s surface."alsotransitive

3. (transitive, mathematics) To form the central angle of a circle underneath an arc.Examples: "The points A and B on the circumference form the arc AB, which subtends the central angle θ."transitive

4. (botany, transitive) To stand beneath or close to, as a bract at the base of a flower.transitive