Deterministic Random Bit Generator (DRBG)

A Random Bit Generator (RBG) that includes a DRBG mechanism and (at least initially) has access to a source of entropy input. The DRBG produces a sequence of bits from a secret initial value called a seed, along with other possible inputs. A DRBG is often called a Pseudorandom Number (or Bit) Generator.
SOURCE: SP 800-90A