…(of a mobile phone) having three frequencies, enabling it to be used in different regions (typically Europe and the US)…
…a breathing mixture for deep-sea divers, composed of nitrogen, helium, and oxygen…
…having or relating to three axes, especially in mechanical or astronomical contexts…
…a flag with three bands or blocks of different colours, especially the French national flag with equal upright bands of blue, white, and red…
…(of a pair of glasses) having lenses with three parts with different focal lengths…
…an early type of aeroplane with three pairs of wings, one above the other…
…of or relating to the parliamentary system operating in South Africa between 1983 and 1994, in which the legislature consisted of three ethnically based houses…
…any of a group of peptides containing three amino-acid residues in the molecule…
…a thyroid hormone similar to thyroxine but having greater potency…
