a pregnancy that is confirmed by a pregnancy test but not by clinical signs and terminates before clinical signs can be observed.
pregnancy resulting from in vitro fertilization or another medical technique.
noun 1. Chemistry. a property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed: Combustibility is an important chemical property to consider when choosing building materials. noun a characteristic of a substance that becomes known during a chemical reaction; also, a […]
noun 1. wood pulp made from chemically treated and cooked wood fibers and used in the manufacture of better grades of paper.
noun 1. Chemistry. (def 7). noun 1. a process that involves changes in the structure and energy content of atoms, molecules, or ions but not their nuclei Compare nuclear reaction A process in which atoms of the same or different elements rearrange themselves to form a new substance. While they do so, they either absorb […]
noun 1. an allergic sensitivity to particular chemicals in air, food, clothing, water, etc.