General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

A name used to designate a large group of citrus fruits in the species Citrus reticulata and some of its hybrids. This group is variable in the character of trees and fruits since the term is used ...

Olivine

Science; General science

A name given to a group of magnesium-iron silicate minerals crystallising in the orthorhombic system. Crystals are usually of simple habit, a combination of the dipyramid with prisms and pinacoids. ...

Sunfish

Science; General science

A name given primarily to certain members of the freshwater family Centrarchidae, as well as to members of the marine family Molidae and the freshwater family Elassomatidae. These fishes are ...

Opal

Science; General science

A natural hydrated form of silica. Opal is a relatively common mineral in its nongem form, which is known as common opal and lacks the play of colour for which gem, or precious, opal is known. All ...

Pitchstone

Science; General science

A natural glass with dull or pitchy lustre and generally brown, green, or grey color. It is extremely rich in microscopic, embryonic crystal growths (crystallites) which may cause its dull ...

Cave

Science; General science

A natural cavity located underground or in the side of a hill or cliff, generally of a size to admit a human. Caves occur in all types of rocks and topographic situations. They may be formed by many ...

Coir

Science; General science

A natural fiber, also known as coco fiber, obtained from the husks of the coconut ( Cocos nucifera ). Although coconuts are grown for copra throughout the tropics and into the subtropics, more than ...