(astronomy) A major grouping of stars represented on a Hertzsprung-Russell diagram by a nearly uniform band of increasing luminosity with increasing surface temperature.

(genetics) The sequence at the 5' end of an mRNA molecule that is not translated into protein.

Any device that activates or deactivates the components of a machine or system according to a preplanned sequence (as in a washing machine, or central heating system).

(pathology) A disease or condition which follows chronologically after an earlier disease or problem, being either wholly or partly caused by it, or made possible by it.

A suite of rocks containing a variety of separate strata, with an overall lithology that can be used to interpret the paleoenvironment of deposition over a certain period.

A DNA or protein sequence with a high degree of sequence identity to other sequences in that species, or in others.

plural of sequela

(genetics) The string of base pairs (adenine, thymine, cytosine, and guanine) which, when arranged in triplets to form codons, create a DNA string which encodes polypeptides.

(transitive, intransitive, rare) To commit a non sequitur; to make a statement that does not logically follow a previous statement.

Alternative form of non sequitur.