its reborrowing. psychedelic < 'psyche' + 'make manifest, reveal'; the regular formation would be psychodelotic; telegram; the regular formation would have been telegrapheme; hecto-, kilo-, myria-, etymologically hecato-, chilio-, myrio-; heuristic, regular formation heuretic; chrysalis, regular spelling chrysallis; ptomaine, regular formation ptomatine; kerosene, hydrant, symbiont. Many combining forms have specific technical meanings in neologisms, not predictable from the Greek sense: -cyte or cyto- < 'container', means biological cells, not arbitrary containers. -oma < , a generic morpheme forming deverbal nouns, such as diploma ('a folded thing') and glaucoma ('greyness'), comes to have the very narrow meaning of 'tumor' or 'swelling', on the model of words like carcinoma < . For example, melanoma does not come from 'blackness', but rather from the modern combining forms melano- ('dark' [in biology]) + -oma ('tumor'). -itis < , a generic adjectival suffix; in medicine used to mean a disease characterized by inflammation: appendicitis, conjunctivitis, ..., and now facetiously generalized to mean "feverish excitement". -osis < , originally a state, condition, or process; in medicine, used for a disease. In standard chemical nomenclature, the numerical prefixes are "only loosely based on the corresponding Greek words", e.g. octaconta- is used for 80 instead of the Greek ogdoeconta- '80'. There are also "mixtures of Greek and Latin roots", e.g., nonaconta-, for 90, is a blend of the Latin nona- for 9 and the Greek found in words such as ἐνενήκοντα enenekonta '90'. The Greek form is, however, used in the names of polygons in mathematics, though the names of polyhedra are more idiosyncratic. Many Greek affixes such as anti- and -ic have become productive in English, combining with arbitrary English words: antichoice, Fascistic. Some words in English have been reanalyzed as a base plus suffix, leading to suffixes based on Greek words, but which are not suffixes in Greek (cf. libfix). Their meaning relates to the full word they were shortened from, not the Greek meaning: -athon or (from the portmanteau word walkathon, from walk + (mar)athon). -ase, used in chemistry for enzymes, is abstracted from diastase, where -ασις is not a morpheme at all in Greek. -on for elementary particles, from electron: lepton, neutron, phonon, ... -nomics refers specifically to economics: Reaganomics. Through other languages Some Greek words were borrowed through Arabic and then Romance. Many are learned: alchemy (al- + or ) chemist is a back-formation from alchemist elixir (al- + ) alembic (al- +