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Total record count: 6269.

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Eng ID Term Definition
5741
tuff-cone
See TUFF.
5742
tunny net
A net built at sea for catching tunnies.
5743
turbidite
Turbidity current deposits, characterized by both vertically and horizon­tally graded bedding.
5744
turbidity
Reduced water clarity resulting from the presence of suspended matter. Water is considered turbid when its load of suspended matter is visib... more
Reduced water clarity resulting from the presence of suspended matter. Water is considered turbid when its load of suspended matter is visibly con­spicuous, but all waters contain some suspended matter and therefore are turbid. Reduced transparency of the ATMOSPHERE, caused by absorption and SCATTERING of RADIATION by solid or liquid particles, other than CLOUDS, held there in suspension.
5745
turbidity current
See CURRENT.
5746
turbulence
A state of fluid flow in which the instan­taneous VELOCITIES exhibit irregular and apparently random fluctuations, so that in practice only ... more
A state of fluid flow in which the instan­taneous VELOCITIES exhibit irregular and apparently random fluctuations, so that in practice only stati­stical properties can be recognized and submitted to analysis. Superimposed on the mean motion of the air, an agita­tion composed of air motions which are uncoor­dinated and in a state of continuous change.
5747
turbulent flow
A FLOW characterized by TURBULENCE.
5748
turning basin
An enlargement of a channel for turning vessels. Also called manoeuvering basin.
5749
turning buoy
A BUOY marking a turn, as in a CHANNEL.
5750
turning point
In LEVELLING, a point on which both a minus sight (FORESIGHT) and a plus sight (BACKSIGHT) are taken on a line of DIRECT LEVELL­ING. In TOPO... more
In LEVELLING, a point on which both a minus sight (FORESIGHT) and a plus sight (BACKSIGHT) are taken on a line of DIRECT LEVELL­ING. In TOPOGRAPHIC SURVEYS, any point on which the rod is held while the instrument (PLANE TABLE) is moved to another STATION. In a TRAVERSE, any point of junction of two LEGS. Also called traverse point.
5751
turn of the tide
See CHANGE OF TIDE.
5752
twilight
The periods of incomplete darkness following SUNSET (evening twilight) or preceding SUNRISE (morning twilight). Twilight is designated as ci... more
The periods of incomplete darkness following SUNSET (evening twilight) or preceding SUNRISE (morning twilight). Twilight is designated as civil, nautical, or astronomical, as the darker limit occurs when the centre of the SUN is 6°, 12°, or 18° below the CELESTIAL HORIZON, respectively.
5753
twilight stars
STARS suitably placed for ASTRONOM­ICAL OBSERVATION during morning or evening TWILIGHT.
5754
two-way route
A route within defined limits inside which two-way traffic is established, aimed at provi­ding safe passage of ships through waters where na... more
A route within defined limits inside which two-way traffic is established, aimed at provi­ding safe passage of ships through waters where navi­gation is difficult or dangerous.
5755
tyfon
See TYPHON.
5756
type
In printing (TYPOG­RAPHY) a metal block having a raised letter or figure which, when inked, is used to make an impression on paper or other ... more
In printing (TYPOG­RAPHY) a metal block having a raised letter or figure which, when inked, is used to make an impression on paper or other material. Type can also be in the form of negative or positive strip­p­ing film.
5757
type face
A type of print, such as Roman, Egyptian, Caslon, etc.
5758
type of tide
The charac­teristic feature of the TIDE (TIDAL CURRENT) determined from the combination of its diurnal and semidiurnal components. TIDES are... more
The charac­teristic feature of the TIDE (TIDAL CURRENT) determined from the combination of its diurnal and semidiurnal components. TIDES are classi­fied as SEMIDIURNAL, MIXED and DIURNAL, but there are no sharply defined limits separating the groups.
5759
typhon
A diaphragm HORN which operates under the influence of compressed air or steam. Called SIREN in Canadian terminology. Also called tyfon.
5760
typhoon
Name given to TROPICAL CYCLONES of the China Sea and, more generally, of the north-west Pacific.