What does "hemiptera" mean?

Hemiptera: An order of hexapod insects having a jointed proboscis, including four sharp stylets (mandibles and maxillæ), for piercing. In many of the species (Heteroptera) the front wings are partially coriaceous, and different from the others. Note: They are divided into the Heteroptera, including the squash bug, soldier bug, bedbug, etc.; the Homoptera, including the cicadas, cuckoo spits, plant lice, scale insects, etc.; the Thysanoptera, including the thrips, and, according to most recent writers, the Pediculina or true lice.