Pulmonary hypertension is a type of high blood pressure that affects the arteries in your lungs and the right side of your heart. In one form of pulmonary hypertension, tiny arteries in your lungs, called pulmonary arterioles, and capillaries become narrowed, blocked or destroyed. This makes it harder for blood to flow through your lungs, and raises pressure within your lungs' arteries.
â¢ LISP (noun) The noun LISP has 2 senses: 1. a speech defect that involves pronouncing 's' like voiceless 'th' and 'z' like voiced 'th'. 2. a flexible procedure-oriented programing language that manipulates symbols in the form of lists. Familiarity information: LISP used as a noun is rare. â¢ LISP (verb) The verb LISP has 1 sense:
Scheme is primarily a functional programming language. It shares many characteristics with other members of the Lisp programming language family. Scheme's very simple syntax is based on s-expressions, parenthesized lists in which a prefix operator is followed by its arguments.s in other Lisps, the term  thunk  is used in Scheme to refer to a procedure with no arguments. The term proper tail recursion refers to the property of all Scheme implementations, that they perform tail-call optimization so as to support an indefinite number of active tail calls.