A marine mollusc, of the family Nautilidae native to the Pacific Ocean and Indian Ocean, which has tentacles and a spiral shell with a series of air-filled chambers, of which Nautilus is the type genus.

An event held on the evening of 25th January in celebration of the Scottish poet and lyricist Robert Burns (born on that day in 1759), usually involving Scottish foods and recitals of his poetry.

(euphemistic, usually childish) Feces; the act of defecation. / (nautical, slang) A first mate. / A primary assistant; vice-leader.

(graph theory) The smallest number of colours needed to colour a given graph (i.e., to assign a colour to each vertex such that no two vertices connected by an edge have the same colour).

(botany) a formal scientific name of a plant, especially as conforming to the ICBN.

(of a chord or sonority) The lowest note played or notated

Completely naked.

(taxonomy) The scientific name of a genus. / (pharmacology, pharmacy) The name given to a drug that is used to identify it irrespective of trademark etc.

Being or relating to a situation that will either succeed completely or fail completely.

The hard-shelled edible seed of the macadamia tree.