A statistical Markov model in which the system being modelled is assumed to be a Markov process with unobserved (hidden) states.

(UK, Ireland) stingy, frugal.

(idiomatic) A state of dread.

Any species of the taxonomic subfamily Zapodinae or family Zapodidae of rodents, variously endemic to North America or China.

Tyria jacobaeae, a Eurasian moth with brilliant red and black wings

Extreme tooth decay resulting from long-term use of methamphetamine.

plural of perpetual motion machine

A person having a mouth full of words; a chatterer.

Alternative form of morning gift

(obsolete, UK) A superficially friendly person, who is otherwise not a friend.