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relay
relay electromechanical switch operated by a flow of electricity in one circuit and controlling the flow of electricity in another circuit. A relay consists basically of an electromagnet with a soft iron bar, called an armature, held close to it. A movable contact is connected to the armature in ...
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Hymen
Hymen or Hymenaeus , in Greek mythology, personification of marriage, represented as a beautiful youth carrying a bridal torch and wearing a veil.
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sense
sense faculty by which external or internal stimuli are conveyed to the brain centers, where they are registered as sensations. Sensory reception occurs in higher animals through a process known as transduction, in which stimuli are converted into nerve impulses and relayed to the brain. The four c...
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SOS
SOS code letters of the international distress signal. The signal is expressed in International Morse code as … — — — … (three dots, three dashes, three dots). This combination was established by the International Radiotelegraphic Conventi...
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Comus
Comus , in late Roman legend, god of mirth and revelry. A follower of Dionysus, he was represented as a drunken youth bearing a torch. In Milton's poetic masque, Comus, he is the mischievous son of Bacchus and Circe.
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calcium oxide
calcium oxide chemical compound, CaO, a colorless, cubic crystalline or white amorphous substance. It is also called lime, quicklime, or caustic lime, but commercial lime often contains impurities, e.g., silica, iron, alumina, and magnesia. It is prepared by heating calcium carbonate (e.g., lime...
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logic circuit
logic circuit electric circuit whose output depends upon the input in a way that can be expressed as a function in symbolic logic ; it has one or more binary inputs (capable of assuming either of two states, e.g., "on" or "off" ) and a single binary output. Logic circuits that perform parti...
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Morse code
Morse code [for S. F. B. Morse ], the arbitrary set of signals used on the telegraph (see code ). It may also be used with a flash lamp for visible signaling . The international (or continental) Morse code is a simplified form generally used in radio telegraphy. The American Morse differs from...
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figwort
figwort common name for some members of the Scrophulariaceae, a family comprising chiefly herbs and small shrubs and distributed widely over all continents. The family includes a few climbing types and some parasitic and saprophytic forms.
Common Species and Their Uses
Among its many wild...
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flame
flame phenomenon associated with the chemical reaction of a gas that has been heated above its kindling temperature with some other gas, usually atmospheric oxygen (see combustion ). The heat and light given off are characteristic of the specific chemical reaction (or reactions) going on; the lumi...
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