Skin bracers or fresheners [edit]. These are the mildest form of toners; they contain water and a humectant such as glycerine, and little if any alcohol (0â10%).
analogous. adj. 1. similar or corresponding in some respect. 2. (Biology) biology (of organs and parts) having the same function but different evolutionary origin Compare homologous 4: the paddle of a whale and the fin of a fish are analogous. 3. (Linguistics) linguistics formed by analogy: an analogous plural.
Equivalent (chemistry) An equivalent (symbol: Eq) is the amount of a substance that reacts with (or is equivalent to) an arbitrary amount of another substance in a given chemical reaction. It is an archaic unit of measurement that was used in chemistry and the biological sciences in the era before researchers knew how to determine the chemical formula for a compound.