hodo-, hod-, od-

A publication that appears at fixed intervals (daily, weekly, monthly, or yearly).

1. Referring to publications that are produced and presented at specific or regular intervals.
2. Performed in a period, or regular revolution; proceeding in a series of successive circuits: "There are periodical revolutions or motions of the planets around the sun."

"Happening, by revolution, at a stated periodical time; such as, returning regularly, after a certain period of time; acting, happening, or appearing, at fixed intervals; recurring; as, periodical epidemics."

1. Repeatedly at regular times: "The equipment should be periodically tested each week."
2. At stated times: "The festival is periodically celebrated in the community."

1. The recurrence of something at regular intervals.
2. Similarity between the properties of chemical elements that are close to each other in the periodic table.

An intermission or pause for relaxation: "Jim's uncle says that he can accomplish much more after he has a rest period each day."

The time it takes for a planet or satellite to make one complete circuit of its orbit (360°) relative to the stars: "The Earth's sidereal period, or sidereal year, is equal to 365.2564 mean solar days."

1. An assembly of ecclesiastics or other church delegates, convoked pursuant to the law of the church, for the discussion and decision of ecclesiastical affairs; an ecclesiastical council.
2. A special council of church members that holds regular meetings to discuss religious issues.
3. Etymology: from Late Latin synodus, which came from Greek synodos, "assembly, meeting, conjunction of planets"; from syn-, "together" + hodos, "a going, a way".

Referring to the response of an organism to a portion of time in which there are changes in heat levels: "There are a variety of responses by plants to thermoperiodic cycles or temperature fluctuations."

Responses of organisms to periodic, annual or diurnal, to the differences of temperatures: "There are various thermoperiodicities that effect the growth and reproduction of plants or animals because of their exposures to varied temperatures."

1. A postglacial interval of warmer and drier climate; approximately equivalent to the Altithermal period or the Subboreal period.
2. A long phase of the postglacial geological history of Europe with a warm and dry climate: "The Xerothermal Period is chronologically corresponding to the end of the Atlantic and the beginning of the Subboreal period (4,000-5,000 years ago)."