Aliens or Xenomorphs, form the Alien franchise go through several stages of development.
One of these is hard to define. The chest burster feeds on its host like a parasite,
Wiki - Parasitism
Parasitism is a type of non mutual relationship between organisms of different species where one organism, the parasite, benefits at the expense of the other, the host.
But its shape and form is determined by the host, like a hybrid.
Wiki - Hybrids
In general usage, hybrid is synonymous with heterozygous: any offspring resulting from the mating of two distinctly homozygous individuals
Which of these descriptions is most accurate? Can both be applied to the same creature? If not, then what sort of creature is a chestburster?