Chimera

Chimera is the technical term for what Max and the other Manticore children are genetically.  
The definition of the word, from the Encarta World English Dictionary:

chi·me·ra (plural chi·me·ras) or chi·mae·ra (plural chi·mae·ras) noun
    1.  something totally unrealistic or impractical:  a figment of the imagination, for example, a wildly unrealistic idea or hope or a completely impractical plan
    2.  GENETICS organism with genetically different tissues:  an organism, or part of one, with at least two genetically different tissues resulting from mutation, the grafting of plants, or the insertion of foreign cells into an embryo. Also called mosaic
3.  EMBRYOLOGY organism with DNA from different sources:  an organism that has genetic material from a variety of sources as a result of the insertion of unspecialized cells stem cells from other species into an embryo

The word is pronouced: ki meera (to hear it pronounced, or to look up another word, go to http://dictionary.msn.com and look it up there.