You will learn and practice how to: 1  determine thunderstorm base, top, and the trigger needed to get the storm started. 2  identify the boundary layer, cap, troposphere, tropopause, and stratosphere. 3  use the thermo diagram to help calculate various humidities. 4  determine temperature change of vertically moving air parcels.
The term ''immediate precursor'' means a substance 1  -. (A) which the Attorney General has found to be and by regulation designated as being the principal compound used, or produced primarily for use, in the manufacture of a controlled substance; (B) which is an immediate chemical intermediary used or likely to be used in the manufacture of such controlled substance; and.
Princeton's WordNet (0.00 / 0 votes) Rate this definition: precursor (noun). a substance from which another substance is formed (especially by a metabolic reaction). precursor, forerunner (noun). a person who goes before or announces the coming of another.earby & related entries: 1  precum. 2  precuneus. 3  precurrer. 4  precurse. 5  precursive. 6  precursor b-cell lymphoblastic leukemia-lymphoma. 7  precursor cell. 8  precursor cell lymphoblastic leukemia-lymphoma. 9  precursor cells, b-lymphoid. 10  precursor cells, t-lymphoid.