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A glossary of science-related words.

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A mineral found in igneous rocks and in sedimentary rocks made up from fragments of igneous material. It often contains radioactive elements, which makes it useful in some radiometric dating techniques.


A white crystalline oxide of the metal element zirconium (atomic number 40). Certain forms of zirconia are used as advanced ceramics with engineering and medical applications.


A series of 12 constellations that are centred upon the ecliptic – the apparent path of the Sun, Moon and visible planets as they cross the sky (celestial sphere).


Early stage in the life cycle of a crab. Characterised by the use of thoracic appendages to swim.


A ring of ligaments connecting the ciliary body and the lens of the eye that hold the lens in place.


The study of animals.


A virus that normally infects animals that is able to infect humans.


Tiny shrimp-like animals that drift with water currents.


The diploid cell that results from the joining of two haploid gametes (fertilisation).