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- Dictionaryrare/rɛː/
adjective
- 1. (of an event, situation, or condition) not occurring very often: "a rare genetic disorder" Similar Opposite
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6 days ago · The rare-earth elements (REE), also called the rare-earth metals or rare earths or, in context, rare-earth oxides, and sometimes the lanthanides (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals.
Jun 12, 2024 · Rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 (scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body of the periodic table (cerium [Ce] through lutetium [Lu]).
Jun 6, 2024 · A collectible refers to an item worth far more than it was initially sold for because of its rarity and/or popularity. A collectible's price usually depends on its condition and...
Jun 13, 2024 · Endangered species, any species that is at risk of extinction because of a sudden rapid decrease in its population or a loss of its critical habitat. Previously, any species of plant or animal that was threatened with extinction could be called an endangered species.
Jun 12, 2024 · Parthenogenesis ( / ˌpɑːrθɪnoʊˈdʒɛnɪsɪs, - θɪnə -/; [1] [2] from the Greek παρθένος, parthénos, 'virgin' + γένεσις, génesis, 'creation' [3] ) is a natural form of asexual reproduction in which growth and development of an embryo occur directly from an egg, without need for fertilization.
Jun 9, 2024 · The International Union for Conservation of Nature (IUCN) uses the term ‘rare’ to designate those species which are found in isolated geographical locations. They are not classified as endangered but are classified as ‘at risk’.
Jun 11, 2024 · It is a feeling that is not necessarily malicious; it often arises from a sense of justice being served or seeing someone perceived as arrogant being taken down a peg. However, it can also stem from envy, competitiveness, or bitterness, revealing the darker sides of human nature.
Jun 4, 2024 · To deceive someone by providing false information or selling something of little value. Example: I can’t believe I was sold a bill of goods; the car is a complete lemon. To have one’s hands tied. To be unable to act freely due to rules or other restrictions. Example: I’d like to help with your request, but I have my hands tied by company policy.
Jun 11, 2024 · Rare variants are alternative forms of a gene that are present with a minor allele frequency (MAF) of less than 1%. Latest Research and Reviews. Identification...
Jun 1, 2024 · Extinction, in biology, is the dying out or extermination of a species. It occurs when species are diminished because of environmental forces (natural or human-made) or because of evolutionary changes in their members. Learn more about mass extinctions and modern extinctions.
