1) The periodic rising and falling of the waters of the ocean and its inlets.
The tides result from the → gravitational attraction
of the → Moon and → Sun
acting upon the rotating → Earth.
→ ebb tide,
→ high tide,
→ low tide,
→ neap tide,
→ spring tide,
→ tidal braking,
→ tidal bulge,
→ tidal capture,
→ tidal coupling,
→ tidal current,
→ tidal disruption,
→ tidal force,
→ tidal friction,
→ tidal heating,
→ tidal locking,
→ tidal radius,
→ tidal stretching.
M.E.; O.E. tid "time, hour" (cf. O.S. tid, Du. tijd, O.H.G. zit, Ger. Zeit "time").
Kešand, from Mod./Mid.Pers. kešidan/kašidan "to draw, protract, trail, drag, carry," dialectal Yaqnavi xaš "to draw," Qomi xaš "streak, stria, mark," Lori kerr "line;" Av. karš- "to draw; to plow," karša- "furrow;" Proto-Iranian *kerš-/*xrah- "to draw, plow;" cf. Skt. kars-, kársati "to pull, drag, plow;" Gk. pelo, pelomai "to move, to bustle;" PIE base kwels- "to plow."
Firmly or closely fixed in place. → compact.
M.E. thight, from O.N. thettr "watertight, close in texture, solid" (cf. second element in O.E. metethiht "stout from eating;" M.H.G. dihte "dense, thick," Ger. dicht "dense, tight," O.H.G. gidigan, Ger. gediegen "genuine, solid, worthy"), from PIE base *tenk- "to become firm, curdle, thicken;" cf. Ir. techt "curdled, coagulated," Lith. tankus "close, tight;" cognate with Pers. tang "tight," as below.
Tang "tight; narrow, straight; tight," also "horse girth, a strap for fastening a load" (Mid.Pers. tang "tight, narrow"), tanjidan "to squeeze, press, pull together;" cf. Skt. tanákti "draws together, contracts;" cognate with E. tight, as above; PIE base *tenk- "to become firm, curdle, thicken."
tight star cluster
xuše-ye setâreyi-ye tang
Fr.: amas stellaire serré
A cluster of stars in which members are closely situated so that high resolution observations are required to distinguish them individually.
Optics: A deviation in the propagation direction of a beam of light. Tilt quantizes the average slope in both the X and Y directions of a → wavefront or phase profile across the pupil of an optical system.
M.E. tylten "to upset, tumble," from tealt "unsteady" (cf. O.N. tyllast "to trip," Swed. tulta "to waddle," Norw. tylta "to walk on tip-toe," M.Du. touteren "to swing").
Gerâ, present stem of gerâyidan "to incline toward; to intend; to make for." Gerâ may be a variant of Mod.Pers. kil "bent, inclined" (k/g and l/r interchanges), from PIE base *klei- "to lean, incline," cognate with L. clinare "to bend" (E. declination, inclination, etc.), Gk. klinein "to cause to slope, slant, incline," Skt. sri- "to lean," O.Pers. θray-, Av. sray- "to lean," P.Gmc. *khlinen (Ger. lehnen, E. lean).
Fr.: angle d'inclinaison
The angle a rocket makes with the vertical as it curves along its trajectory.
zamân (#), gâh (#), vaqt (vaxt) (#), tâmen
1) A non-spatial sequential relation in which events occur in apparently irreversible
succession from the past through the present to the future.
→ time's arrow.
M.E.; O.E. tima "limited space of time," from P.Gmc. *timon "time" (cf. O.N. timi "time," Swed. timme "an hour"), akin to L. tempus (genitive temporis) "time" (Fr. temps, Sp. tiempo, It. tempo); maybe related to Pers. Tabari tum, tomon, temen "time;" Aftari ton "time."
Zamân "time," from Mid.Pers. zamân, jamân "time," zamânak
loaned into Aramaic and Ar.,
loaned into Arm. žam, žamanak "time;"
prefixed Sogdian nγm "time, moment, hour;"
Proto-Iranian *gām- "to go, to come;"
cf. Av. gam- "to come; to go," jamaiti "goes;"
O.Pers. gam- "to come; to go;" Mod./Mid.Pers. gâm
"step, pace," âmadan "to come;" cf. Skt. gamati "goes;"
Gk. bainein "to go, walk, step;" L. venire "to come;"
Tocharian A käm- "to come;" O.H.G. queman "to come;" E. come;
PIE base *gwem- "to go, come."
tesk-e zamân, ~ vaqt
Fr.: attribution de temps de télescope
The assignment of telescope time by an expert panel to proposals after evaluating the merits of the observation projects.
Fr.: constante de temps
Th speed of response of a detector, usually measured as 1/(2πν), where ν is the chopping frequency at which the responsivity fails to 1/√2 of its maximum value.
time delay distance
apest-e derang-e zamâni
A distance-like quantity derived from → gravitational lensing time delay. It is given by a combination of three angular diameter distances in a strong lens system: DΔt = (1 + zL)[DA(EL)DA(ES) / DA(LS)], where zL is the → redshift of the → gravitational lens, while DA(EL), DA(ES), and DA(LS) are the angular diameter distances from the Earth to the lens, from the Earth to the source, and from the lens to the source, respectively. As each of the distance is proportional to the inverse of H0, DΔt is proportional to 1/H0.
Fr.: dilatation du temps
A phenomenon related to special and general relativity.
time of periapsis passage
zamân-e gozar az pirâhabâk
Fr.: temps de passage au périapse
Fr.: résolution temporelle
Same → temporal resolution.
Fr.: renversement du temps
A transformation operating on time in the equations of motion of a dynamical system in which t is replaced by -t.
Fr.: échelle de temps
A measure of duration of a specific process, such as → crossing time, → dynamical time scale, → evolutionary time scale, → Kelvin-Helmholtz time scale, → nuclear time scale, → photon escape time, → relaxation time, → star formation time scale.
Fr.: série temporelle
zonâr-e zamân, zamân-zonâr
Fr.: fuseau horaire
Any of the 24 zones on the Earth surface delimited by → meridians at approximately 15° intervals. In each time zone a common standard time is used, and the time is one hour earlier than the zone immediately to the east.
Fr.: flèche du temps
The sequence of all natural processes in which the → entropy increases. In other words, the fact that these processes all move in one direction in time and are → irreversible. The past is distinctly different from the future; things always grow older, never younger.
Fr.: genre temps
Fr.: intervalle genre temps