Quenya 

telluma

dome, copula

telluma noun "dome, copula", especially the "Dome of Varda" over Valinor, but also applied to the domes of the mansion of Manwë and Varda upon Taniquetil. Adopted from Valarin _delgūmā under the influence of pure Quenya telumë (WJ:399, 411). Pl. tellumar is attested (Nam, RGEO:66)_.

telluma

noun. dome, cupola, vault

A word for a “vault” or “dome” in the Namárië poem (LotR/377; RGEO/58). In the Quendi and Eldar essay from 1959-60, Tolkien said telluma “dome, cupola” was an alteration of telumë under the influence of the Valarin word Val. delgūmā “dome”, used “especially the ‘Dome of Varda’ over Valinor, but also applied to the domes of the mansion of Manwe and Varda upon Taniquetil” (WJ/399, 411). As such, this word may not have been in common use, being applicable only to the “holy domes” of the Valar.

Derivations

Element in

Phonetic Developments

DevelopmentStagesSources
Val. delgūmā > telluma[delgūmā] > [telgūmā] > [telɣūmā] > [telɣumā] > [telɣuma] > [telluma]✧ WJ/399
Quenya [LotR/0377; PE17/066; RGEO/58; WJ/399; WJ/411] Group: Eldamo. Published by

telumë

dome, roof, canopy

telumë noun "dome, roof, canopy" (TEL/TELU, WJ:411 cf. 399; see also telluma); "firmament" (MC:214), inflected telumen in MC:221 (the latter is "Qenya"). Telumehtar "warrior of the sky", older name of Menelmacar = Orion (Appendix E, TEL/TELU, WJ:411); Telumendil *"Sky-friend", name of a constellation (Silm)