spike

1. An inflorescence in which the main axis is elongated and the flowers are sessile. 2. The deliberate addition of a known quantity of a known substance to an analytical sample, used to validate the analytical technique.

1. An overshoot line created erroneously by a scanner and its rasterizing software.
2. An anomalous data point that protrudes above or below an interpolated surface representing the distribution of the value of an attribute over an area.

An extremely short pulse of relatively high amplitude.

One barge that is wired to head of tow that is 2 or 3 barges wide.