an·ti·ret·ro·vi·ral -'re-trō-.vī-rəl adj acting, used, or effective against retroviruses <\antiretroviral drugs> <\antiretroviral therapy>
antiretroviral n an antiretroviral drug
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an·ti·ret·ro·vi·ral (an″te-) (an″ti-retґro-vi″rəl) 1. effective against retroviruses. 2. an agent having this effect.Medical dictionary. 2011.