Science / Tides and Currents / Double Tide: A double-headed tide, that is, a high water consisting of two maxima of nearly the same height separated by a relatively small depression, or a low water consisting of two minima separated by a relatively small elevation. Sometimes called an agger. See gulder.
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Double Verb Synonyms: twofold, paired, coupled, duplicate(d), doubled
Double Adjective Synonyms: folded or doubled or bent over, overlapped, two-ply
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Science / Chemistry / Nucleotide: A molecule which is a basic building block of nucleic acids and which plays a key role in energy transfer in biochemical reactions. Nucleotides consist of a five-carbon sugar, a heterocyclic nitrogen- MORE
Science / Chemistry / Nucleotide Base: A heterocyclic nitrogen-containing base that is a constituent of nucleotides. Examples are adenine, guanine, thymine, uracil, and cytosine. MORE
Science / Biology / Nucleotide Sequences: The genetic code encrypted in the sequence of bases along a nucleic acid. MORE
Science / Biology / Nucleotides: The subunits of nucleic acids; composed of a phosphate, a sugar, and a nitrogen-containing base. The fundamental structural unit of the nucleic acid group of organic macromolecules. Some nucleotides a MORE
Science / Tides and Currents / Normal Tide: A nontechnical term synonymous with tide; i.e., the rise and fall of the ocean due to the gravitational interactions of the Sun, Moon, and Earth alone. Use of this term is discouraged. MORE
Science / Biology / Nicotine Adenine Dinucleotide Phosphate (NADP): A substance to which electrons are transferred from photosystem I during photosynthesis; the addition of the electrons reduces NADP, which acquires a hydrogen ion to form NADPH, which is a storage for MORE