epicranium

/ep-i-krey-nee-uhm/US // ˌɛp ɪˈkreɪ ni əm //

陨石,陨石矿,外延,陨铁

Definitions

n.名词 noun

1
plural ep·i·cra·ni·a [ep-i-krey-nee-uh]. /ˌɛp ɪˈkreɪ ni ə/.
- : Anatomy. the layer of scalp formed by muscle and flattened tendon.
- : Entomology. the top of the head in insects, usually including the frons, genae, and vertex.

Clypeal suture: marks the division between clypeus and epicranium.
Epicranial plate: in some larvae a plate-like structure forming the epicranium.
Protocranium: the posterior part of the epicranium: sometimes used as Occiput.
The head is extended from behind forwards, so that the crown (epicranium) is large, while the face (clypeus) is small.
Above is the crown (vertex or epicranium), on which or on the “front” may be seated three simple eyes (ocelli).