Words similar to optional

Example sentences for: optional

How can you use “optional” in a sentence? Here are some example sentences to help you improve your vocabulary:

The left-hand panel lists the genes, the databases from which their identities were derived, and optional up- and down-arrows to indicate under- or over-expression; the middle panel shows a tree visualization of categories in the style of the AmiGO browser [ 1 ] and, in addition, provides a visualization of the flagged genes in the particular microarray experiment.
I find Bollard's superior \?\, used to transcribe both the “optional r ” ambiguous.
The global standard for identification is a digital photograph; fingerprints are optional.
His or her duties include converting all public remarks by the speaker of the House into iambic pentameter (rhyming optional); composing ribald limericks about any lawsuits filed against the president for sexual harassment; and debating the chairman of the Senate Foreign Relations Committee about whether a poem is lovely as a tree.
The analysis finds that the new rule would not be significantly burdensome for small entities because use of the profile is optional and that the information contained in the profile is now typically contained a fund's prospectus.