Hidden Markov Models (HMMs). A hidden Markov model models a Markov process, but assumes that there is uncertainty in what state the system is in at any given time. A common metaphor is to think of the HMM as if the Markov Model were a mechanism hidden behind a curtain.
For the scientific journal, see Molecules (journal) . 3D (left and center) and 2D (right) representations of the terpenoid molecule atisane. A molecule (/ËmÉlÉªkjuËl/ from Latin moles mass) is an electrically neutral group of two or more atoms held together by chemical bonds.
Full Definition of MOLECULE. 1. : the smallest particle of a substance that retains all the properties of the substance and is composed of one or more atoms. 2.: a tiny bit: particle.See molecule defined for English-language learners.See molecule defined for kids. ADVERTISEMENT. the smallest possible amount of a particular substance that has all the characteristics of that substance. : a very small amount of something.