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18 Topic Pages Found in Science and starting with the letter J
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Open Jackals

name for several Old World carnivorous mammals of the genus Canis, which also includes the dog and the wolf . Jackals are found in Africa and S Asia,

Open Jackfruit

The Malaysian fruit of a tree, Artocarpus heterophyllus or A. integrifolia , which can take up to six months to ripen from picking. The fruit is large

Open Jade

common name for either of two minerals used as gems. The rarer variety of jade is jadeite, a sodium aluminum silicate, NaAl(SiO 3 ) 2 , usually white

Open jaguar

( jăg'wär ), large New World carnivore of the cat family, Panthera onca. Jaguars range from the SW United States to S central Argentina, though there

Open Japan, Sea of
Japan, Sea of

or East Sea, enclosed arm of the Pacific Ocean, c.405,000 sq mi (1,048,950 sq km), located between Japan and the Asian mainland, connecting with the


( jăs'mĭn, jăz– ) or jessamine jĕs'əmĭn , any plant of the genus Jasminum of the family Oleaceae ( olive family). The genus, which includes shrubs and

Open Jasper

Jasper is a massive opaque variety that is a mixture of chalcedony, quartz and opal. The name comes from the Latin name for the stone, iaspis , which

Open Jellyfishes

common name for the free-swimming stage (see polyp and medusa ), of certain invertebrate animals of the phylum Cnidaria (the coelenterates). The body

Open Jenner, Edward (1749 - 1823)
Jenner, Edward (1749 - 1823)

English physician who pioneered vaccination. In Jenner's day, smallpox was a major killer. His discovery in 1796 that inoculation with cowpox gives

Jerne, Niels (1911 - 1994)

British-born Danish microbiologist and immunologist who was awarded a Nobel Prize for Physiology or Medicine in 1984, with Georges Köhler and César