ex|on

ex|on¹ «EHK son», noun.

a segment of DNA that specifies the genetic code for a protein, as distinguished from an intervening sequence (intron): »

In general the introns of split genes are longer than the exons (Scientific American).

╂[< ex- outer, outside + -on]

ex|on² «EHK son», noun.

each of four officers (originally corporals) of the yeomen of the royal English bodyguard, who in turn command in the absence of their superior officers.

╂[Anglicization of French exempt]