1) To make evident or establish by arguments or reasoning; prove.
From L. demonstratus, p.p. of demonstrare "to show, point out," from → de- + monstrare "to show," from monstrum "sign, portent."
Padišidan, from Sogd. padēš "to show," ultimately from Proto-Ir. *apa-dais-, from *dais- "to show," cf. Av. daēs- "to show," related to andiš, → think.
1) The → act or → circumstance
of proving or being → proved conclusively, as
by → reasoning or a show of → evidence.
Verbal noun of → demonstrate.
A person or thing that demonstrates (Dictionary.com).
The removal of mystery or confusion surrounding a topic or idea.
To rid of mystery or obscurity; clarify. The removal of mystery or confusion surrounding a topic or idea.
1) A branching treelike figure produced on or in a mineral by a foreign
From Gk. dendrites "of or pertaining to a tree," from dendron "tree," cognate with Pers. deraxt, variant dâr, → tree.
Šâxzâré, from šâxzâr, from šâxsâr "full of branches," from šâx, šâxé, → branch, + suffix -zâr denoting profusion, and abundance, as in kârzâr "a field of battle; combat" šurezâr "unfertile, salty ground; nitrous earth," xoškzâr "arid land," and so forth.
The branch of → botany dealing with trees and shrubs. Dendrology studies the distinguishing characteristics of tree species for the purpose of identification and classification into orders and other natural groups.
Deneb (α Cygni)
Deneb "tail," from Ar. dhanab ad-dajajah (
Zanab, from Ar., as above.
Denebola (β Leonis)
Širdom, Zanab-ol-asad (#)
Denebola, from Ar. dhanab al-asad (
Fr.: dénégation, démenti
1) An assertion that something said, believed, alleged, etc., is false.
The quantity y in a fraction x/y. The quantity x is the → numerator.
M.L. denominator, from denomina(re), from → de- + nominare "to name, call by name," from nomen "name," cognate with Pers. nâm "name," as below.
Nâmân, adj./agent noun of nâmidan "to name," from nâm "name;" Mid.Pers. nâm; O.Pers./Av. nâman-; cf. Skt. nama-; Gk. onoma, onuma; L. nomen; PIE *nomen-.
1) To condemn or censure openly or publicly.
Having relatively high → density.
From L. densus "thick, crowded," cognate with Gk. dasys "hairy, bushy, thick grown."
Cagâl "dense, thick," related to ceqer "stiff, hard, tough, firm" (dialectal Kermâni ceqel, Šândizi caqal), caqâlé "stiff, unripe fruit."
Fr.: coeur dense
An opaque region of a → molecular cloud (AV 10 mag) which is considered to be the progenitor of → star formation. Dense cores have temperatures of about 10 K and masses of roughly 1 to 10Msun each and in which the → molecular hydrogen density is roughly 104-105 cm-3 and size 0.1 pc. The → self-gravity of a dense core plays a central part in star formation. See also → hot molecular core.
dense core mass function
karyâ-ye jerm-e maqze-ye cagâl
Fr.: fonction de masse des cœurs denses
dense molecular cloud
abr-e molekuli-ye cagâl
Fr.: nuage moléculaire dense
A type of → interstellar medium cloud in which → carbon (C) becomes almost completely molecular due to relatively high → extinction. The chemistry is qualitatively different from that of → diffuse molecular clouds, as the → electron abundance is very low (→ cosmic-ray ionization being the dominant source) and the reactive C is replaced by the very stable → carbon monoxide (CO). This regime is found only in → sightlines with AV > 5-10 mag; not all such sightlines will contain dense cloud material and if dense cloud material is present it is likely to be surrounded by → translucent material. These clouds are typically → self-gravitating, and are most often observed by → infrared absorption and → millimeter wave emission methods. Their densities are typically at least 104 cm-3, and their → kinetic temperatures are typically on the order of 10-50 K in the quiescent regions. Most of the more than 140 currently known → interstellar molecules were found through observations of → microwave→ rotational transitions in such clouds, starting with the discovery of OH, followed by a host of other new detections such as CO, NH3, H2O, and H2CO (Snow & McCall, 2006, ARA&A 44, 367).
The amount of any quantity per unit volume. The mass density is the
mass per unit volume. The energy density is the energy per unit
volume; particle density is the number of particles per unit volume.
Noun form of → dense.
Fr.: fluctuations de densité
In the early Universe, localized enhancements in the density of either matter alone or matter and radiation. According to models, very small initial fluctuations (less than 1 percent) can lead to subsequent formation of galaxies.
Fr.: paramètre de densité
One of the four terms that describe an arranged version of the
→ Friedmann equations. They are all time dependent.
Fr.: profile de densité