What's the adjective for xenomorph? Here's the word you're looking for.
xenomorphic
(petrography, of a mineral grain) That does not have its characteristic crystalline form but has a form impressed on it by surrounding grains; anhedral.
“The different types of FAHs have been related to three main preneoplastic hepatocellular lineages: the glycogenotic basophilic cell lineage, its xenomorphic tigroid cell variant, and the amphophilic basophilic cell lineage.”
“Carbonate mineral individuals are characterized with xenomorphic morphostructures of limitation surfaces.”
“The porosity is partially macroscopic, visible by plain sight, with round, oval and xenomorphic pores, average size between 10 and 180 urn.”