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1.Coco de Mer
2.Coconut
3.Idiot Fruit
4.Avocado
5.Mango
6.Peach
7.Acorn

Source:
http://en.wikipedia.org/wiki/List_of_world%27s_largest_seeds

The Sea Coconut also known as Coco de Mer (Lodoicea maldivica), the sole member of the genus Lodoicea, is a palm endemic to the islands of Praslin and Curieuse in the Seychelles. It formerly also was found on the small islets of St Pierre, Chauve-Souris and Ile Ronde (Round Island), all located near Praslin, but has become extinct there. The name of the genus, Lodoicea, is derived from Lodoicus, the Latinised form of Louis, in honour of King Louis XV of France.

The coconut palm (Cocos nucifera), is a member of the family Arecaceae (palm family). It is the only accepted species in the genus Cocos.[2] The term coconut can refer to the entire coconut palm, the seed, or the fruit, which, botanically, is a drupe, not a nut. The spelling cocoanut is an archaic form of the word.[3] The term is derived from 16th-century Portuguese and Spanish coco, meaning "head" or "skull",[4] from the three indentations on the coconut shell that resemble facial features.

Found throughout the tropic and subtropic area, the coconut is known for its great versatility as seen in the many uses of its different parts. Coconuts are part of the daily diets of many people. Coconuts are different from any other fruits because they contain a large quantity of "water" and when immature they are known as tender-nuts or jelly-nuts and may be harvested for drinking. When mature, they still contain some water and can be used as seednuts or processed to give oil from the kernel, charcoal from the hard shell and coir from the fibrous husk.

The avocado (Persea americana) is a tree native to Mexico and Central America,[1] classified in the flowering plant family Lauraceae along with cinnamon, camphor and bay laurel. Avocado or alligator pear also refers to the fruit, botanically a large berry that contains a single seed.[2]

Avocados are commercially valuable and are cultivated in tropical and Mediterranean climates throughout the world. They have a green-skinned, fleshy body that may be pear-shaped, egg-shaped, or spherical. Commercially, they ripen after harvesting. Trees are partially self-pollinating and often are propagated through grafting to maintain a predictable quality and quantity of the fruit.

The mango is a fleshy stone fruit belonging to the genus Mangifera, consisting of numerous tropical fruiting trees, that are cultivated mostly for edible fruits. The majority of these species are found in nature as wild mangoes. They all belong to the flowering plant family Anacardiaceae. The mango is native to South and Southeast Asia, from where it has been distributed worldwide to become one of the most cultivated fruits in the tropics.

The peach (Prunus persica) is a deciduous tree, native to North-West China, in the region between the Tarim basin and the north slopes of the Kunlun Shan mountains, where it was first domesticated and cultivated.[2] It bears an edible juicy fruit also called a peach. The species name persica refers to its widespread cultivation in Persia, whence it was transplanted to Europe.

Peaches and nectarines are the same species, even though they are regarded commercially as different fruits. In contrast to peach whose fruits present the characteristic fuzz on the skin nectarines are characterized by the absence of fruit skin trichomes (fuzz-less fruit); genetic studies suggest nectarines are produced due to a recessive allele, whereas peaches are produced from a dominant allele for fuzzy skin.[3]
China is the world's largest producer of peaches.

The acorn, or oak nut, is the nut of the oaks and their close relatives (genera Quercus and Lithocarpus, in the family Fagaceae). It usually contains a single seed (rarely two seeds), enclosed in a tough, leathery shell, and borne in a cup-shaped cupule. Acorns vary from 1--6 cm long and 0.8--4 cm broad. Acorns take bet