Definition and meaning of Fahrenheit temperature scale:

Fahrenheit temperature scale - a thermometric scale on which the freezing point of water is at 32 degrees F (Fahrenheit) above the 0 degree (F) mark on the scale, and the boiling point of water is at 212 degrees F

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fin:

fin - organ of locomotion and balance in fishes and some other aquatic animals; in fishes, fins are of two types: paired (pectoral and pelvic fins) and unpaired or median (dorsal, adipose, anal, and caudal fins and finlets). Fins of bony fishes contain hard spines and/or soft rays, which may be jointed and branched. The spines and rays are covered by integument. Counts of spines and rays are used as diagnostic characters in fish taxonomy; a membranous, finlike, swimming organ, as in pteropod (having the anterior lobes of the foot modified so as to form a pair of winglike swimming organs), and heteropod (where the foot developed into a median fin) mollusks

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fin:

fin (scuba) - a rubber or plastic shoe-like device attached to the feet to increase surface area for greater thrust while swimming; they may be open heeled or full-footed. Scuba divers prefer the open heel style, usually worn with booties

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fin membrane:

fin membrane - the thin membrane between and connecting fin rays and spines of fishes

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fin ray:

fin ray - a slender, rod-shaped structure that supports the membranes of the fins of fishes. There are two types of rays, soft rays and spines. Soft rays are jointed, often branched, and flexible near their tips. Spines are unjointed, unbranched, and usually sharp at the tip and stiff along the shaft

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fine sediment:

fine sediment - a sediment composed of fine-grained materials, such as clay or mud particles

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fingerling:

fingerling - a young or small fish

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of finlet:

finlet - one of several small non-retractable fins located dorsally and ventrally between the second dorsal and anal fins and the caudal fin of scombroids (mackerals, tuna) and some other fishes, e.g., sauries and snake mackerals. Finlets appear to have a hydrodynamic function in fishes that have been studied for this character

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fire coral:

fire coral - a species of hydroid (Millepora sp.) that frequently is brownish to orange-yellow in color and forms encrusting colonies that can assume the shape of its support structure. Their nematocysts release a virulent toxin which causes painful welts on human skin. Fire corals are not true corals (see Hydrozoa)

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fire wall:

fire wall - a combination of hardware and software that separates a network into two or more parts for security purposes

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of first revisor:

first revisor - in zoological nomenclature, the person who first selects one of two or more simultaneously published names that he or she believes represent the same taxon, or who selects which one of two or more taxa the name will apply to for which identical names have been simultaneously published; also applies to first selection of multiple original spellings

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of First Revisor:

First Revisor (Principal of) - the principle that the relative precedence of two or more names or nomenclatural acts published on the same date, or of different original spellings of the same name, is determined by the first reviser

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of first stage regulator:

first stage regulator - attached to the scuba tank, the first stage regulator reduces the high tank pressure to an intermediate pressure of 100 to 150 psi above the surrounding water pressure

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of firth:

firth - a partly land-locked arm of the sea

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fluorescence in situ hybridization:

FISH (fluorescence in situ hybridization) - hybridization of cloned DNA to intact chromosomes, where the cloned DNA has been labelled with a fluorescent dye. This is the major method of physical mapping of cloned DNA fragments on chromosomes

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fish census:

fish census - the collection of data over time concerning the species of fishes in an area, their relative abundances, and population densities

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fish kill:

fish kill - the sudden death of fishes due to the introduction of pollutants, toxic blooms, or the reduction of the dissolved oxygen concentration

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fish louse:

fish louse - a parasitic crustacean on marine and freshwater fishes

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of FishBase:

FishBase - a repository of available information on the taxonomy, biology, ecology, occurrence and utilization of fishes. It holds published information on almost all of the estimated 25,000 existing fish species. The information is arranged in 55 subject tables. It can be accessed through the Internet ( http://www.fishbase.org) or installed on a PC from a CD-ROM. At the heart of FishBase is the authoritative taxonomic fish classification established by W.N. Eschmeyer (California Academy of Science). It ensures that all information is assigned to current scientific names, even if a publication uses an outdated name

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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Definition and meaning of fisher:

fisher - anyone involved in the harvesting, processing, or marketing of fishes or shellfish

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

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