Orange

 was a citrus fruit that grew on orange trees. They were eaten raw or squeezed to create orange juice.

Oranges grew in the warm Mediterranean climate of the Duchy of San Martino in 15th century Italy. Sarah Jane Smith was picking and eating oranges when she was captured by members of the Cult of Demnos. (TV: The Masque of Mandragora)

In order to ingratiate themselves into the world of the Redcoats, Polly Wright and Kirsty McLaren disguised themselves as orange sellers in the style of Nell Gwynn. (TV: The Highlanders)

Before taking her to the Palace Theatre, the Fourth Doctor promised Leela, "if you're very good, I'll buy you an orange." (TV: The Talons of Weng-Chiang)

Like other citrus fruits, oranges were rich in citric acid, a precursor to Vitamin C. They would not have been on the menu for Cessair of Diplos, for whom citric acid was toxic, a fact discovered by Romana and Professor Rumford. (TV: The Stones of Blood)

One Christmas eve, the Fourth Doctor and Romana snuck into Alistair Gordon Lethbridge-Stewart's house dressed as Santa Claus and left two oranges and a walnut in his Christmas stocking. (PROSE: Better Watch Out, Better Take Care)

Bitter oranges were served at King Gilgamesh's court in Uruk. (PROSE: Timewyrm: Genesys)

In one alternate timeline, oranges grew in and around central London, but were inedible and glowed. They were used by the human survivors as night lights. (PROSE: Blood Heat)

The Tenth Doctor compared the draining of human life energy by Richard Lazarus to "squeezing the juice out of an orange". (TV: The Lazarus Experiment)

Skullions preferred citrus juices (such as orange and lemon) as water "[burned]" them. (TV: The Man Who Never Was)

Behind the scenes
An orange Jelly baby collectable card is one of 50 collectable cards released as part of The Adventure Games.