An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The matter or environment between the galaxies of a → cluster.

→ intergalactic; → medium.

1a) An intervening time; interval; meantime.
1b) A temporary or provisional arrangement.
2) For, during, belonging to, or connected with an intervening period of time; temporary; provisional (Dictionary.com).

L. interim (adv.) "in the meantime, meanwhile," originally "in the midst of that," from → inter- "between" + im, an old accusative of "is, he, this, that."

Andarim, from andar-, → inter-, + im variant em "this;" Mid.Pers. im "this;" from Old.Pers./Av. ima "this;" Skt. ima; cf. Lori (Laki) im "this side." The Mid.Pers. im occurs in Mod.Pers. as em- in emruz "today," emšab "tonight," and emsâl "this year."

The internal or inner part. → differentiated interior.

From L. interior "inner," comparative adj. of inter "within."

Daruné, from darun "in, into; within" (Mid.Pers. andarôn "inside," from andar, → inter-, + rôn "side, direction;" Av. ravan- "(course of a) river") + -é nuance suffix.

1) Any of the four angles formed between two straight lines intersected by a third straight line (→ transversal).
2) The angle between two adjacent sides of a polygon that lies inside the polygon.

→ interior; → angle.

1) (Adj.) Being or acting at the middle place or stage, or between extremes.
2a) (n.) A person who acts between others; something intermediate.
2b) Chemistry: A molecular entity that is formed (directly or indirectly) from the reactants and reacts further to give (either directly or indirectly) the products of a chemical reaction (PAC, 1996, 68, 149, A glossary of terms used in chemical kinetics, including reaction dynamics, IUPAC Recommendations 1996).
See also:
→ intermediate boson, → intermediate frequency, → intermediate infrared, → intermediate-mass black hole, → intermediate-mass protostar, → intermediate-mass star.

Intermediate, from M.L. intermediatus "lying between," from L. intermedius "that which is between," from → inter- "between" + medius "located in the middle;" PIE root *medhyo- "middle;" cf. Pers. miyân, as below; Av. maidiia-, Skt. mádhya-; Gk. medos, messos "middle;"

Miyâni, adj. of miyân "within, between, center," from Mid.Pers. mayân "middle; among, between," Av. maidiia- "middle, the middle," maiδiiāna- "middle, center;" cf. Skt. mádhya- "middle, located in the middle;" G.H.G. mitti "located in the middle."
Andarmiyâni, adj. of andarmiyân "in the middle," from andar-, → inter-, + miyân, as above.
Miyânji "intermediary, mediator," from Mid.Pers. mayânjig, from mayân.

A hypothetical → elementary particle that mediates the → weak interaction, carrying its effect from one particle to another as the photon does for electromagnetic interactions. First introduced in 1961 by Sheldon Glashow.

→ intermediate; → boson.

In a → superheterodyne receiver, a frequency resulting from the combination of the received modulated → carrier frequency and the → local oscillator frequency.

→ intermediate; → frequency.

The infrared radiation with wavelengths between about 1.5 and 20 microns. → near infrared; → far infrared.

→ intermediate; → infrared.

A → black hole with a mass in the range 10²-10⁴ solar masses. IMBHs may form as the result of multiple → mergers of smaller objects in the centers of dense stellar clusters in the present universe, assuming → mass loss from → stellar winds is not significant. They may also arise from the evolution of → very massive stars early in the history of the Universe, forming black hole "seeds" in the centers of massive halos (the precursors of the galaxies we see today) early in the history of the Universe, to redshifts z > 10. Currently the best observational evidence for IMBHs comes from models of ultraluminous X-ray sources (See, e.g., J. M. Centrella et al. 2010, astro-ph/1010.5260).

→ intermediate; → mass; → black; → hole.

A protostar that evolves into an → intermediate-mass star.

→ intermediate; → mass; → protostar.

A star whose mass lies in the range about 2 to 8 → solar masses approximately.

→ intermediate; → mass; → star.

A property of a turbulent dynamical system which is characterized by chaotic, irregular behavior occurring between quiet (or less irregular) periods. In other words, a → turbulent flow having a large → Reynolds number undergoes a phenomenon in which its turbulent activity at a fixed location stops from time to time and starts again. In fact → turbulence never completely disappears, but it can become extremely weak interrupted irregularly by bursts of strong turbulence (see also → developed turbulence). For intermittent flows → probability density functions are not → Gaussian. Turbulent intermittency plays a fundamental role in fields ranging from combustion physics, chemical engineering, meteorology, to astrophysical systems, more specifically the → interstellar medium.

From L. intermittent, pr.p. of intermittere "to leave a space between, drop (for a while), leave off," from → inter- + mittere "to send, let go."

Raftomând, literally "to go and to stop," from raft past stem of raftan "to go, walk, proceed" (present stem row-); Mid.Pers. raftan, raw-, Proto-Iranian *rab/f- "to go; to attack") + -o- euphonic infix + mând past stem of mândan "to remain, stay, relinquish, leave" (Mid.Pers. mândan "to remain, stay," mân "house, home;" O.Pers. mān- "to remain, dwell;" Av. man- "to remain, dwell; to wait;" cf. Gk. menein "to remain;" L. manere "to stay, remain, abide," mansio "a staying, a remaining, night quarters, station" (Fr. maison, ménage; E. manor, mansion, permanent; PIE *men- "to remain, wait for").

Alternately ceasing and beginning again; adj. of → intermittency.

Adjective of → intermittency.

A unidirectional electric current that flows and ceases to flow at irregular or regular intervals.

→ intermittent; → current.

A Force acting between molecules.

→ inter-; → molecular; → force.

Situated or occurring in the interior of something; interior.

From M.L. internalis, from L. internus "within," from inter "between," → inter-.

Daruni, adj. of darun " in, into; within" (Mid.Pers. andarôn "inside," from andar, → inter-, + rôn "side, direction;" Av. ravan- "(course of a) river").

Of an → H II region, the absorption of photons by the dust which is mixed with ionized gas, in contrast to the absorption by the → interstellar dust on the line of sight.

→ internal; → absorption.

A → radiationless relaxation process in which a molecule in some excited → electronic state converts to a state of the same → multiplicity but of lower electronic energy and in which the lost electronic energy is converted initially into vibrational energy.

→ internal; → conversion.

The difference between the energy added to a system and the energy given up by the system in performing work.

→ internal; → energy.

A wave generated inside a density-stratified fluid under the influence of → buoyancy forces. Known also as → gravity wave or internal wave.

→ internal; → gravity; → wave.