blood test

Short definition from Wiktionary

Noun

1. 1
   A laboratory analysis performed on a blood sample that is usually extracted from a vein in the arm using a hypodermic needle, or by fingerprick.
2. 2
   An analysis of blood performed on two subjects to determine whether they are biologically related, such as a paternity test.

Verb

1. 1
   To administer or conduct a blood test (on someone).
2. 2
   Alternative form of blood test