portion of the sample obtained by selection or division; individual unit of the lot taken as part of the sample; final unit of multistage sampling. (Horwitz, 1990)
sample selected from a sample frame that is itself a sample of a larger population. Often the original sample is used to identify individuals or organizations of interest or is used to sort units into groups to be sampled at different rates.
(See definitions at Analytical Unit and Sample) Webbing Fibrous material secreted by certain larval insects and arachnids during feeding and development. Typically associated with larval infestations of certain stored-product moths.