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circumpolar star

(Encyclopedia)circumpolar star, star whose diurnal circle lies completely above or completely below an observer's horizon. A star whose diurnal circle lies above the horizon never sets, even though it cannot be see...

Gorgias

(Encyclopedia)Gorgias gôrˈjēəs [key], c.485–c.380 b.c., Greek Sophist. From his native city, Leontini, Sicily, he was sent as an ambassador to Athens, where he settled to teach and practice rhetoric. Gorgias ...

disinfectant

(Encyclopedia)disinfectant, agent that destroys disease-causing microorganisms and their spores. Disinfectants, or germicides, are sometimes considered to be substances applied to inanimate bodies, whereas antisept...

fallacy

(Encyclopedia)fallacy, in logic, a term used to characterize an invalid argument. Strictly speaking, it refers only to the transition from a set of premises to a conclusion, and is distinguished from falsity, a val...

post-mortem examination

(Encyclopedia)post-mortem examination or autopsy, systematic examination of a cadaver for study or for determining the cause of death. Post-mortems use many methodical procedures to determine the etiology and patho...

potential, electric

(Encyclopedia)potential, electric, work per unit of electric charge expended in moving a charged body from a reference point to any given point in an electric field (see electrostatics). The potential at the refere...

fuller's earth

(Encyclopedia)fuller's earth, mineral substance characterized by the property of absorbing basic colors and removing them from oils. It is composed mainly of alumina, silica, iron oxides, lime, magnesia, and water,...

Half-Way Covenant

(Encyclopedia)Half-Way Covenant, a doctrinal decision of the Congregational churches in New England. The first generation of Congregationalists had decided that only adults with personal experience of conversion we...

MERS

(Encyclopedia)MERS or Middle East respiratory syndrome, relatively rare viral disease caused by MERS-CoV, a coronavirus. Although some infected persons have no or only coldlike symptoms, in most known cases of MERS...

verdict

(Encyclopedia)verdict, in law, official decision of a jury respecting questions of fact that the judge has laid before it. In the United States, verdicts must be unanimous in federal courts; majority verdicts are c...