American Heritage® Dictionary of the English Language, Fourth Edition
- n. A metallic mixture, once considered an element, composed of neodymium and praseodymium.
- n. A mixture of rare-earth elements and oxides used chiefly in manufacturing and coloring various forms of glass.
Century Dictionary and Cyclopedia
- n. Chemical symbol, D or Di. A supposed element announced by Mosander in 1841, so named from being, as it were, the twin brother of lanthanum, previously discovered in the same minerals which yielded didymium, and from whose compounds those of didymium are separated with much difficulty. The most recent investigations indicate that didymium is not an element, but a mixture of several different elements.
- n. [capitalized] A genus of fungi belonging to the Myxomycetes. The sporangia have a double wall, which is covered externally with crystals of lime, either scattered or compacted into a separable crust.
GNU Webster's 1913
- From Greek didumos, twin, double; see dwo- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“The word didymium comes from a Greek word meaning "twin," because it was closely associated with the element lanthanium, both of which were found with cerium.”
“Instead it is targeting the mixture—also known as didymium—that is crucial in making magnets.”
“Elemental Attraction didymium Yet it didn't pledge to underpin all rare-earth prices.”
“Japan is the world's top importer of the minerals, which have such names as lanthanum and didymium.”
“Prices have increased after China, which controls about 95% of the world's rare-earth supply, said it would slash exports of the metals—such as lanthanum and didymium—by 35% this year.”
“It produces rare-earth elements such as lanthanum and didymium.”
“Investing article about the IPO of Molycorp Inc. incorrectly said didymium is a rare-earth element.”
“Now if they could just make them to hold my lampwork didymium lenses- that could be so cool.”
“This number coincides with the atomic volumes of zirconium (21.7), cerium (21.1), lanthanum (22.6), and didymium”
“[Footnote 1: Has priority over niobium.] [Footnote 2: Now split into neo-and praseo-didymium.] [Footnote 3: Has priority over beryllium.] [Footnote 4: Standard, or basis of the system.] *****”
These user-created lists contain the word ‘didymium’.
Words that sound like they might be the names of elements of the periodic table, but that aren't. Many of the words listed here were actually proposed as names for substances their creators thought...
Names and spellings formerly used for elements. Not entirely complete because I refuse to take notice of some of the sillier ones.
a reflection on siththen - a word used during and before Chaucer's time
Looking for tweets for didymium.