molybdenum

en-noun

molybdenum (countable and uncountable, plural molybdenums)

From New Latin molybdaenum, from molybdaena (“any of various substances resembling lead”), from Ancient Greek μολύβδαινα (molúbdaina, “a plummet, piece of lead”), from μόλυβδος (mólubdos, “lead; graphite”), from an Anatolian word cognate with Lydian 𐤪𐤠𐤭𐤦𐤥𐤣𐤠 (mariwda, “dark”), from Proto-Indo-European *morkʷ-iyo-, from a root *morkʷ- (“dark”), cognate with English murk. Cf. Latin plumbum nigrum, lead. The suffix is + -um (“a chemical element”).
Attested since the last quarter of 18th century.

der

The metals at preſent amount to 21 ; only 11 of which were known before the year 1730. Their names are gold, ſilver, platinum, mercury, copper, iron, tin, lead, zinc, antimony, biſmuth, arſenic, cobalt, nickel, manganeſe, tungſten, molybdenum, uranium, tellurium, titanium, chromum.

1803, “Of Metals”, in George Gleig, editor, Supplement to the Third Edition of the Encyclopædia Britannica, or, A Dictionary of Arts, Sciences, and Miscellaneous Literature, 2nd edition, volume I, page 225:

Technical terms like ferrite, perlite, graphite, and hardenite were bandied to and fro, and when Paget glibly brought out such a rare exotic as ferro-molybdenum, Benson forgot that he was a master ship-builder, […]

1928, Lawrence R. Bourne, chapter 4, in Well Tackled!:

At pH levels below 5, wheat yields may be low, molybdenum may become unavailable to plants, and other trace elements may be concentrated to toxic levels.

1990, Arthur J. Conacher, “Salt of the Earth”, in Environment, volume 32, number 6, page 40:

A chemical element (symbol Mo) with an atomic number of 42: a silvery metal, not found as a free element, used in steel alloys.


molybdenum disulfide

(chemistry) a black, crystalline inorganic polymer of empirical formula MoS₂ that occurs as the mineral molybdenite and is used as a lubricant having a structure analogous to graphite


moly

The fuselage and tail unit were constructed of welded chrome-moly steel tubing, fabric covered, with two seats in one elongated open 'bathtub' cockpit.

1990, John Wegg, General Dynamics Aircraft and Their Predecessors, page 55:


molybdenite

en-noun

molybdenite (countable and uncountable, plural molybdenites)

molybdenum disulfide
molybdenum disulfide

(mineralogy) A mineral, molybdenum disulfide MoS₂, that is the principal ore of molybdenum; it is structurally similar to graphite and has a similar look and feel.


organomolybdenum

(organic chemistry) Describing any organic compound containing a carbon to molybdenum bond.


molybdeniferous

en-adj

molybdeniferous (comparative more molybdeniferous, superlative most molybdeniferous)

more molybdeniferous (comparative)
most molybdeniferous (superlative)


molybdian

molybdian (comparative more molybdian, superlative most molybdian)

more molybdian (comparative)
most molybdian (superlative)


molybdaenum

la-noun

molybdaenum n (genitive molybdaenī); second declension

molybdaenī (genitive)
molybdaenum (nominative singular)
molybdaena (nominative plural)
molybdaenī (genitive singular)
molybdaenōrum (genitive plural)
molybdaenō (dative singular)
molybdaenīs (dative plural)
molybdaenum (accusative singular)
molybdaena (accusative plural)
molybdaenō (ablative singular)
molybdaenīs (ablative plural)
molybdaenum (singular vocative)
molybdaena (plural vocative)

[mɔlʲʏbˈd̪äe̯nʊ̃ˑ]

From New Latin molybdaena (“any of various substances resembling lead, including lead and molybdenum, their sulphides, and graphite”), from Ancient Greek μολύβδαινα (molúbdaina, “a plummet”), from μόλυβδος (mólubdos, “lead; graphite”), from an Anatolian word cognate with Lydian 𐤪𐤠𐤭𐤦𐤥𐤣𐤠 (mariwda, “dark”), from Proto-Indo-European *morkʷ-iyo-, from a root *morkʷ- (“dark”).
Attested since the last quarter of 18th century.


molybdovanadate

(inorganic chemistry) A complex anion (and associated salts) containing both molybdate and vanadate species; the salts are used in the analysis of phosphate


molybdenum blue

(inorganic chemistry) A complex oxide derived from a heteropoly acid of molybdenum and another element, typically phosphorus


ferromolybdenum

en-noun

ferromolybdenum (countable and uncountable, plural ferromolybdenums)


moly cow

From moly (informal term for molybdenum) + cow. The word cow alludes to the fact that the device “milks” technetium-99m from molybdenum-99: see quotations.

When the ⁹⁹Tcₘ isotope is needed for medical imaging purposes, it has to be created on the spot because its half-life is only six hours. This is done using a device filled with longer-lived ⁹⁹Mo, which decays into ⁹⁹Tcₘ, continually replenishing the supply within the device. Because the process of removing the accumulated ⁹⁹Tcₘ is called "milking", the device is informally known as a "moly cow."

2012, Theodore [W.] Gray, The Elements: A Visual Exploration of Every Known Atom in the Universe, New York, N.Y.: Black Dog & Leventhal Publishers, →ISBN:

The radioactive isotope molybdenum-99 (half-life of 66 hours) decays to generate technetium-99m, which has a half-life of only six hours and is used in hospitals for medical imaging. The technetium isotope collects in various parts of the body, in particular bone. Scanners detect the radiation from the isotope to create an image, enabling diagnosis. The process uses a device that is filled with Mo-99, which decays into Tc-99m, forming a continuous supply that is ‘milked off’. The device is nicknamed the ‘moly cow’.

2013, Paul Parsons, Gail Dixon, The Periodic Table: A Field Guide to the Elements, London: Quercus, →ISBN:

Clearly, transporting the daughter in equilibrium with the parent is a more economical, safer, and environmentally friendlier approach. This is the reason that "technetium generators," dubbed "moly cows," are transported around the globe instead of the ⁹⁹ᵐTc isotope.

2013 November 6, Chary Rangacharyulu, “Radioactivity”, in Physics of Nuclear Radiations: Concepts, Techniques and Applications, Boca Raton, Fla.: CRC Press, →ISBN, page 43:

(chemistry, medicine, informal) A device used to extract from a source of decaying molybdenum-99 the metastable isotope ⁹⁹ᵐTc of technetium, which is the most commonly used medical radioisotope.


molybdocene

(organic chemistry) A metallocene containing a molybdenum atom.


vanadomolybdate

The samples were wet-digested with concentrated H 2 SO 4 and H 2 O 2 (30%), and then N content was measured with the micro-Kjeldahl procedure, and P determined by the vanadomolybdate method [19 ].

2015 November 6, “Rational Phosphorus Application Facilitates the Sustainability of the Wheat/Maize/Soybean Relay Strip Intercropping System”, in PLOS ONE, →DOI:

(inorganic chemistry) Synonym of molybdovanadate


molybdosis

Cattle and rabbits appear to be particularly intolerant of high dietary molybdenum levels. For example, in rabbits the symptoms of molybdosis include growth retardation, Alopecia, dermatosis, severe anemia, and bony deformities.

1981, David Franklyn Williams, Systemic Aspects of Biocompatibility, volume 1, page 166:

Owing to the occurrence and economic importance of molybdosis in cattle, this species has been the primary subject of study of molybdenum metabolism.

1984, Owen M. Rennert, Metabolism of Trace Metals in Man: Developmental aspects, page 58:

This concentration is below phytoxic level but is recommended to protect animals from molybdosis because of excess Mo in forages.

1990, Manuals and Reports on Engineering Practice, American Society of Civil Engineers:


selenomolybdoenzyme

(biochemistry) A metalloenzyme containing both selenium and molybdenum


molipđen

[mo˧˧ lip̚˧˦ ʔɗɛn˧˧]

[mow˧˧ lip̚˦˧˥ ʔɗɛŋ˧˧]

[mow˧˧ lip̚˦˥ ʔɗɛŋ˧˧]

Ultimately from New Latin molybdenum, with the suffix -um removed as with most chemical elements.


tetramolybdate

(inorganic chemistry) The oxyanion of molybdenum Mo₄O₁₃²⁻; any salt containing this anion


metamolybdate

(inorganic chemistry) Synonym of tetramolybdate


trimolybdate

(inorganic chemistry) An anion with three molybdenum atoms with the formula Mo₃O₁₀²⁻, or any salt containing this group.


molybdenyl

(inorganic chemistry) A cation or group derived from molybdate


молібден

uk-noun

молібде́н<sg>

молібде́новий

молібде́н • (molibdén) m inan (genitive молібде́ну, uncountable, relational adjective молібде́новий)

молібде́н (canonical)
molibdén (romanization)
молібде́ну (genitive)
молібде́новий (adjective relational)
молібде́н (nominative singular)
молібде́ну (genitive singular)
молібде́нові (dative singular)
молібде́ну (dative singular)
молібде́н (accusative singular)
молібде́ном (instrumental singular)
молібде́ну (locative singular)
молібде́ні (locative singular)
молібде́не (singular vocative)

uk-ndecl

молібде́н<sg>