Medical Definition of metastatic. 1  1: of, relating to, or caused by metastasis cutaneous metastatic disease as the first sign of lung cancer metastatic carcinoma metastatic spread. 2  2: tending to metastasize metastatic cancer cells metastatic prostate cancer.
Acetylcholinesterase inhibitor (generally referred to as cholinesterase inhibitor): a chemical that binds to the enzyme, cholinesterase, and prevents it from breaking down the neurotransmitter, acetylcholine.
DMAE is a precursor to choline, an important nutrient that is often associated with the B-vitamin group. Choline is used by the body for many important functions, which include cell membrane integrity and the healthy functioning of neurotransmitters known as acetylcholines.