Biochemical Cycle: The flow of an element through the living tissue and physical environment of an ecosystem; e. g., the carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus cycles.

 

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Biochemical Cycle: The flow of an element through the living tissue and physical environment of an ecosystem; e. g., the carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus cycles.

Krebs Cycle: Biochemical cycle in cellular aerobic metabolism where acetyl CoA is combined with oxaloacetate to form citric acid; the resulting citric acid is converted into a number of other chemicals, . . . View Full Definition

Metonic Cycle: The nineteen-year cycle named for the Athenian astronomer Meton who discovered (ca. 432) that the new Moon occurs on the same day of the year at approximate nineteen-year intervals.

Menstrual Cycle: The recurring secretion of hormones and associated uterine tissue changes; typically 28 days in length.

Motorcycle: Motorcycles are 2-wheel vehicles patterned after bicycles but with engines and much heavier frames. Early motorcycles were actually bicycles fitted with small internal combustion engines. Th . . . View Full Definition

Motorcycle Assembly: The putting together of manufactured parts to make a completed motorcycle, or the set of parts so assembled.

Mystery Cycle: A collection of mystery plays in a single manuscript meant to be performed sequentially. See discusion under mystery play, below.

Motorcycle Safety Foundation (MSF): The Motorcycle Safety Foundation is a US national, not-for-profit organization sponsored by the U.S. manufacturers and distributors of BMW, Ducati, Harley-Davidson, Honda, Kawasaki, KTM , Pi . . . View Full Definition

Megacycle Per Second (Mc): A frequency of one million cycles per second. The equivalent term MEGA­HERTZ (MHz) is now coming into more frequent use.

Market Cycle: The period between the two latest highs or lows of the S&P 500, showing net performance of a fund through both an up and a down market. A market cycle is complete when the S&P is 15% below t . . . View Full Definition