Common and proper nouns. In linguistics, common nouns and proper nouns are distinct subclasses of nouns. A common noun refers to a class of entity (e.g. dog), whereas a proper noun refers to an individual entity (e.g. John or Kennedy) or a collection of entities (e.g. Hebrides).
Deciduous means falling off at maturity or tending to fall off, and it is typically used in order to refer to trees or shrubs that lose their leaves seasonally (most commonly during autumn) and to the shedding of other plant structures such as petals after flowering or fruit when ripe.any deciduous plants flower during the period when they are leafless, as this increases the effectiveness of pollination. The absence of leaves improves wind transmission of pollen for wind-pollinated plants and increases the visibility of the flowers to insects in insect-pollinated plants.
Tropical deciduous forest - A terrestrial biome similar to tropical rainforest and found at the same latitudes, but rainy and dry seasons are more distinct and the total amount of rainfall is usually less. Most trees are deciduous and drop their leaves during the dry season.