While the moment in time at which a particular nucleus decays is unpredictable, a collection of atoms of a radioactive nuclide decays exponentially at a rate described by a parameter known as the half-life, usually given in units of years when discussing dating techniques.
DEFINITION of 'Attachment'. A legal term referring to the action of seizing property in anticipation of a favorable ruling for a plaintiff who claims to be owed money by the defendant. Next Up.
Definition of attachment. 6 : a separate document or file that is included and sent with an electronic message (such as an e-mail or text message) The trick to sending attachments successfully is to know what e-mail program and operating system your recipient uses.