Citrus likewise refers to the odors from orange, mandarin, lemon, lime, pomelo, etc. which are used as top notes in popular men's colognes and other unisex fragrances.. Citrus is a te rm used in perfumery referring to the notes which are fresh scents similar to the smell of fresh oranges, lemons, grapefruit, bergamot and pomello. Examples of fragrances/perfumes with Citrus Notes are Acqua di Parma Colonia, Cacharel Scarlett, Sarah Jessica Parker Dawn, and many more.