Public Variables. 1  Create a variable in the Command window. 2  Any variable created in the Command window is automatically declared public. 3  For example, from the Command window, type X=1000. 4  The variable X is now public to all applications. 5  Within a program, declare a variable as public by using the PUBLIC command. Create a variable in the Command window. 2  Any variable created in the Command window is automatically declared public. 3  For example, from the Command window, type X=1000. 4  The variable X is now public to all applications.
Any of various unsaturated hydrocarbons in essential oils and certain resins of plants and used in organic syntheses. terpene. Any of a class of hydrocarbons consisting of two or more isoprene (C5H8) units joined together. Simple terpenes are found in the essential oils and resins of plants such as conifers.
The principal constituents of the oil are a terpene, asarol alcohol, another alcohol, and methyl eugenol. The terpene from American turpentine is called austraterebenthene. They are usually present in the plant oil in mixtures with each other or with a terpene. The Chemistry of Plant Life Roscoe Wilfred Thatcher. Hence it is a hydrocarbon of the terpene series, having the general formula CnH2n-4.