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click chemistry
Science; General science
A simplified chemical reaction method recognized in 2001 by a group led by Nobel Laureate Prof. K. Barry Sharpless at the Scripps Research Institute. “Click” is meant to signify ...
koala
Science; General science
A single species, Phascolarctos cinereus , which is a member of the family Phalangeridae in the mammalian order Marsupialia (pouch-bearing animals). It is a small, clean, ...
egg
Science; General science
A single, large, living, female sex cell enclosed in a porous, calcareous shell through which gases may pass. Although they vary in size, shape, and color, the eggs of chickens, ...
septic tank
Science; General science
A single-story, watertight, on-site treatment system for domestic sewage, consisting of one or more compartments, in which the sanitary flow is detained to permit concurrent ...
oligonucleotide
Science; General science
A single-stranded short polymer of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA). Although the number of nucleic acid monomers (known as nucleotides) in the polymer varies ...
harmonic (periodic phenomena)
Science; General science
A sinusoidal quantity having a frequency that is an integral multiple of the frequency of a periodic quantity to which it is related.
precession of equinoxes
Science; General science
A slow change in the direction of the axis of rotation of the Earth, and also a very small change in the orientation of the Earth's orbit around the Sun. Thus, both the celestial ...
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