An upside down pear
A pear was a type of Earth fruit.
In 2270, pears appeared to be among the fruits served on a platter to James T. Kirk, Spock, and Leonard McCoy while they were temporarily being held in the Lactra VII zoo. (TAS: "The Eye of the Beholder")
The same year, pears were apparently on a platter with other fruits on the dining table on the USS Enterprise. Later, pears were among the items that the food synthesizer spat out at Montgomery Scott. (TAS: "The Practical Joker")
In 2370, Alixus offered Miles O'Brien and Benjamin Sisko a pear-like fruit that had been found growing along a riverbank near their settlement on Orellius a few years earlier. (DS9: "Paradise")
Tom Paris introduced spinach juice, with a touch of pear, to Kes upon her joining the crew of the USS Voyager in 2371. (VOY: "Eye of the Needle")
Ensign D'Vana Tendi was aware of Ensign Sam Rutherford's dislike for pears. After his cybernetic implant was removed and replaced, Tendi noted that he was suddenly eating them all the time; leaving cores on his bunk bed, and keeping some in his storage locker. This led Tendi to believe that he may have had synthetic memory degradation. Rutherford eventually discovered that the implant had suppressed a previous, more rebellious personality, and him suddenly enjoying pears was the product of "Red Rutherford", who loved pears, attempting to reassert himself. (LD: "Strange Energies", "Reflections")