
An orange slice is a wheel of fresh orange, carrying flesh, peel and aromatic oil at once.
A cut made for squeezing adds juice instead of looks, and a strip of peel gives aroma and no color. A slice of another citrus behaves the same way in the glass and changes only the shade and the bitterness.
Orange twist
Only the colored peel, cut to be squeezed over the drink; it delivers aroma and no fruit, which is the opposite trade to a slice.
Orange wedge
A lengthwise cut meant to be squeezed into the drink, so it adds juice. A wheel is a crosswise cut that sits in the drink and gives up oil and bitterness slowly instead.
Cut to order. A cut face dries and curls within a couple of hours. Whole oranges keep far longer than most bars need — navel fruit shows no rot for around three months at 5 °C — and unwaxed fruit is worth finding if the peel goes into the glass.