Style encompasses four tropes&colon; metaphor, synecdoche, metonymy, and irony. Metaphors, Metonymy and Synecdoche are used to encode the meaning in an icon system. Synecdoche and metalepsis are considered specific types of metonymy. For Hayden White, tropes historically unfolded in this sequence&colon; metaphor, metonymy, synecdoche, and finally, irony. The majority of icons are encoded and decoded using metonymy, synecdoche, and metaphor. Indeed, synecdoche is considered by some a type of metonymy. Lacan aligns this operation with metaphor rather than metonymy. Like mimicry, hybridity is a metonymy of presence. Rilke often worked with metaphors, metonymy and contradictions. Both metonymy and metaphor involve the substitution of one term for another. Metaphor is distinct from metonymy, both constituting two fundamental modes of thought. The meanings of "vagina" and "vulva" have changed by means of metaphor and metonymy, respectively. Polysemy, multiple meanings of a single word or phrase, sometimes results from relations of metonymy. Greek and Latin scholars of rhetoric made significant contributions to the study of metonymy. Greek scholars contributed to the definition of metonymy.