Definitions for "Central area"
An area in the middle of pennate diatoms with no punctae. This appears as a clear area, the presence, size and shape of which is a useful identification feature.
on each of the intermediate valves, the triangular area formed between the two lateral areas
A BBM defined geographical area (usually centered around one urban center) assigned to a station for reporting purposes. The definition of a Central Market Area generally corresponds to Statistics Canada Areas.