The human immunodeficiency virus (HIV) is a lentivirus (a subgroup of retrovirus) that causes HIV infection and acquired immunodeficiency syndrome (AIDS).AIDS is a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive.Without treatment, average survival time after infection with HIV is estimated to be 9 to 11 years, depending on the HIV subtype.IDS is a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. Without treatment, average survival time after infection with HIV is estimated to be 9 to 11 years, depending on the HIV subtype.
Black Tortoise. The Black Tortoise or Black Turtle is one of the Four Symbols of the Chinese constellations. Despite its English name, it is usually depicted as a turtle entwined together with a snake. Further, in East Asia, it is not called after either animal but is instead known as the Black Warrior under various local pronunciations.
2. loggerhead turtle. 3. loggerhead shrike. 4. a ball or bulb of iron with a long handle, used, after being heated, to melt tar, heat liquids, etc. at loggerheads, in conflict; quarreling. [1580â90; logger block of wood (first attested alone in 18th century) + head ]. logâ²gerâ¢head`ed, adj.. 1. (Animals) Also called: loggerhead turtle a large-headed turtle, Caretta caretta, occurring in most seas: family Chelonidae. 2. (Animals) loggerhead shrike a North American shrike, Lanius ludovicianus, having a grey head and body, black-and-white wings and tail, and black facial stripe.