The difference between the number of double points on a curve and the maximum possible for a curve of that degree

(medicine) An infectious disease, caused by HIV, that causes the gradual degeneration of the body's immune system.

Having a clean and distinct outline / Accurately and precisely described or specified

The state or quality of being defiant.

A syndrome formerly thought to affect children only, but now known also to affect adults, that is characterized by frequent, chronic distractibility, and either inattentiveness or hyperactivity (fidgeting).

(uncountable) Any or all of several formats of television system having a higher resolution than traditional ones / (countable) A television set that employs such a system

plural of high-definition television

(transitive) To break into fibers.

Third-person singular simple present indicative form of defibrillate

simple past tense and past participle of defibrillate