Adjective
Of or pertaining to the prothorax.
Source: Webster's dictionaryInteraction between the pupal brain and prothoracic glands in the metamorphosis of the giant silkworm "Platysamia cecropia". Source: Internet
Neurosecretory cells in an insect's brain secrete a hormone, the prothoracicotropic hormone (PTTH) that activates prothoracic glands, which secrete a second hormone, usually ecdysone (an ecdysteroid ), that induces ecdysis. Source: Internet