Like practically the whole language?

• interpreter

  Strictly speaking, a program that reads a second program and does what the second program says directly without turning the program into a different form first, which is what compilers do. Perl is not an interpreter by this definition, because it contains a kind of compiler that takes a program and turns it into a more executable form (syntax trees) within the perl process itself, which the Perl runtime system then interprets.

Update

Wikipedia lists laxer definitions for Interpreter_(computing)

But since modern languages have multiple layers of "compilation" and processors are loading machine commands into a register for "interpretation", these are quite fuzzy definitions.

update

corrected WP link