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feathers
(Encyclopedia) CE5 Structure of a bird feather feathers, outgrowths of the skin, constituting the plumage of birds. Feathers grow only along certain definite tracts (pterylae), which vary in…coronavirus
(Encyclopedia) coronavirus, any of a group (family Coronaviridae, subfamily Orthocoronavirinae) of enveloped single-stranded RNA viruses that have a crownlike or sunlike appearance under an electron…vasectomy
(Encyclopedia) vasectomy, male sterilization by surgical excision of the vas deferens, the thin duct that carries sperm cells from the testicles to the prostate and the penis. Vasectomy is a popular…bipolar disorder
(Encyclopedia) bipolar disorder, formerly manic-depressive disorder or manic-depression, severe mental disorder involving manic episodes that are usually accompanied by episodes of depression. The…star cluster
(Encyclopedia) star cluster, a group of stars near each other in space and resembling each other in certain characteristics that suggest a common origin for the group. Stars in the same cluster move…monopoly
(Encyclopedia) monopolymonopolymənōpˈəlē [key], market condition in which there is only one seller of a certain commodity; by virtue of the long-run control over supply, such a seller is able to…intelligent design
(Encyclopedia) intelligent design, theory that some complex biological structures and other aspects of nature show evidence of having been designed by an intelligence. Such biological structures are…jellyfish
(Encyclopedia) jellyfish, common name for the free-swimming stage (see polyp and medusa), of certain invertebrate animals of the phylum Cnidaria (the coelenterates). The body of a jellyfish is shaped…radio-frequency identification
(Encyclopedia) radio-frequency identification (RFID), a technology that uses radio waves to transmit data and uniquely identify an animal, person, or thing. An RFID system typically consists of a tag…Romance languages
(Encyclopedia) CE5 Romance languages, group of languages belonging to the Italic subfamily of the Indo-European family of languages (see Italic languages). Also called Romanic, they are spoken by…Trending
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