Talk:epi-

Prefix

Under the English section, it says that the prefix 'epi' can mean above, over, and on, but I believe it can also mean after, like in "epilogue". 2600:4041:5F1D:6200:8D9D:74A2:CDE7:A243 04:18, 8 March 2023 (UTC)

Actually not 'epilogue', when i checked the etymology for that it said that the prefix denoted 'on'. More like "epigenesis". 2600:4041:5F1D:6200:8D9D:74A2:CDE7:A243 04:21, 8 March 2023 (UTC)

Having gone through all the current tagged derived words there were several for which epi- had a sense of after. Epi- may not have started off with this sense but it seems to be a thing now. The examples I just put in were: epiclassical is coming after the classical period and, epigenesis is changes in the mineral content of rock after its formation, Epipaleolithic is the Mesolithic period (post-Paleolithic). And in addition - epicrisis has multiple senses that are after-crisis. Intersets (talk) 03:26, 14 March 2024 (UTC)

Uncategorized senses

So I went through all the derived words and categorized nearly all them based on sense, and if there were at least three derived words for the sense added it to the entry page. Here is what did not make that cut:

Terms I didn't categorize due to a lack of chemistry knowledge:

• epiguanine: The modified purine nucleobase 7-methylguanine, a methylated version of guanine.
• epiaustraline: (organic chemistry) A tetrahydroxypyrrolizidine alkaloid related to alexine and australine.
• epiberberine: (organic chemistry) A particular protoberberine alkaloid
• episulfonium: (organic chemistry) Any cation derived by protonation or other addition to the sulfur atom of a thiirane.
• epitetrasulfide: (organic chemistry) An epicyclic tetrasulfide (that has four sulfur atoms forming an epicycle)

Reading on how epi- gets used in chemistry apparently it can be used to refer to when there is an epicycle (in the chemistry sense) but I can't tell if the above substances have that property or are epimers.

Remaining uncategorized terms:

• epiclastic: (geology) Describing rock formed from fragments of volcanic rock that have been moved to another place. - epi- meaning "it was moved" in geology seems to be a thing, but I just didn't see any other terms tagged on wiktionary with this sense
• epiphysis: (anatomy) The pineal gland. - couldn't find an etymology, guessing the epi- is a positional sense but not sure which.

Intersets (talk) 03:20, 14 March 2024 (UTC)