(zoology) Either of the first pair of maxillae in crustaceans.
noun
1.(in many arthropods) each of a pair of mouthparts used in chewing.
‘The mouthparts consist of a pair of mandibles and 2 pairs of maxillae.’
‘Behind the mandibles, Mandibulata bear one, or more typically, two pairs of maxillae, frequently with a long palp, as in the second maxilla of Macrocyclops.’
2.The jaw or jawbone, specifically the upper jaw in most vertebrates. In humans it also forms part of the nose and eye socket.
‘It may also have had a role in giving some minor flexibility to the snout, as it tends to insert ventrally between the maxilla and premaxilla, and dorsally between the nasal and premaxilla.’
‘The maxilla fuses with the vomer bone and the nasal septum.’
名词 变体/同根词
‘The mouthparts consist of a pair of mandibles and 2 pairs of maxillae.’
