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erythro-. erythro- or erythr- pref. 1. Red: erythrocyte. 2. Erythrocyte: erythropoiesis. [From Greek eruthros, red; see reudh- in Indo-European roots.] erythro- or erythr- combining form (Colours) red: erythrocyte. erythro- a combining form meaning âredâ (erythrocyte) or âred blood cellâ (erythropoiesis).
Permethrin is a common synthetic chemical, widely used as an insecticide, acaricide, and insect repellent. It belongs to the family of synthetic chemicals called pyrethroids and functions as a neurotoxin, affecting neuron membranes by prolonging sodium channel activation.ermethrin is available for topical use as a cream or lotion. It is indicated for the treatment and prevention in exposed individuals of head lice (Pediculus humanus capitis) and treatment of scabies (Sarcoptes scabies).