Antonyms of adj semisynthetic

1 sense of semisynthetic

Sense 1
man-made, semisynthetic, synthetic -- (not of natural origin; prepared or made artificially; "man-made fibers"; "synthetic leather")

INDIRECT (VIA artificial) -> natural -- (existing in or produced by nature; not artificial or imitation; "a natural pearl"; "natural gas"; "natural silk"; "natural blonde hair"; "a natural sweetener"; "natural fertilizers")

Similarity of adj semisynthetic

1 sense of semisynthetic

Sense 1
man-made, semisynthetic, synthetic -- (not of natural origin; prepared or made artificially; "man-made fibers"; "synthetic leather")
       => artificial (vs. natural), unreal -- (contrived by art rather than nature; "artificial flowers"; "artificial flavoring"; "an artificial diamond"; "artificial fibers"; "artificial sweeteners")