American Heritage® Dictionary of the English Language, Fourth Edition
- n. A constellation in the Southern Hemisphere near Hydrus, Eridanus, and Reticulum.
Century Dictionary and Cyclopedia
- n. A clock.
- n. Same as horology, 2.
- n. [capitalized] A southern constellation of twelve stars, inserted by Lacaille east of Eridanus. Its brightest star is of the fourth magnitude.
- n. In botany, a table of the hours at which the flowers of certain plants open and close in a given locality.
- Named by the French astronomer Nicolas Louis de Lacaille in 1763. Originally called Hōrologium Oscillitorium (Latin for "pendulum clock") to honor the Dutch astronomer and mathematician Christian Huygens, inventor of the pendulum clock. (Wiktionary)
- Latin hōrologium, horologe; see horologe. (American Heritage® Dictionary of the English Language, Fourth Edition)
“] [Footnote 410: See the article "Horologium" in _Dict. of Antiquities_, vol. i.] [Footnote 411: Our modern hours are called equinoctial, because they are fixed at the length of the natural hour at the equinoxes.”
“It is not necessary here to explain how the difficulties were overcome; the reader may be referred to the article "Horologium" in the _Dictionary of Antiquities_, and especially to the cuts there given of the dial found at Tusculum in 1761. [”
“Horologium was actually known as "Horologium Oscillatorium" -pendulum clock, but as far as I know, La Caille just named it to honor Christiaan Huygens. its name was never known as the Latinised "Horologium Huyganius”
“Christiaan Huygens announced in Horologium oscillatorium the invention and theory of the pendulum clock.”
“The Greeks do not mention them in Menæa, Menologium, or Horologium, nor do the Copts or”
“Huygens's "Horologium oscillatorium" not only gave the solution of the problem of the centre of oscillation but likewise a statement of the laws which, in circular motion, govern the magnitude of centrifugal force, and thus it was that the eminent physicist prepared the way for Newton, the lawgiver of dynamics.”
“The axiom that had so happily served Huygens in the study of the impact of bodies he now extended to a body oscillating around a horizontal axis and his "Horologium oscillatorium", which appeared in”
“In 1334 Suso translated this work into Latin, but in doing so added considerably to its contents, and made of it an almost entirely new book, to which he gave the name "Horologium Sapientiae".”
“In the "Horologium magnum" of the Greeks there is a proper Office of”
“Observations on a - Roman Horologium. found in Italy, p. 172; Description of the old Font in Ae Church of East Meon, Hampshire; with some Ob -”
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The International Astronomical Union (IAU) recognizes 88 official constellations.
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