English
homoiothermal
Homoiothermal comes from Ancient Greek ὅμοιος ‘of like kind, similar’, from ὁμός ‘same’, and ultimately from Proto-Indo-European *sem- ‘together, one’.
- Proto-Indo-Europeanc. 4500–2500 BCE*sem-1‘together, one’reconstructed
- Proto-Indo-Europeanc. 4500–2500 BCE*somHós2‘same, alike’reconstructed
- Proto-Hellenicc. 2200–1600 BCE*homós2reconstructed
- Ancient Greekc. 800–300 BCEὁμός3‘same’
- Ancient Greekc. 800–300 BCEὅμοιος4hómoios‘of like kind, similar’
- Englishtodayhomoiothermal4
attested reconstructed ? uncertain or disputed deepest recorded ancestor
- 1 Wiktionary, Proto-Indo-European *somHós
- 2 Wiktionary, Ancient Greek ὁμός
- 3 Wiktionary, Ancient Greek ὅμοιος
- 4 Wiktionary, English homoiothermal
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*sem-Wiktionary, Proto-Indo-European *somHós‘together, one’reconstructed
- Proto-Indo-Europeanc. 4500–2500 BCE*somHósWiktionary, Ancient Greek ὁμός‘same, alike’reconstructed
- Proto-Hellenicc. 2200–1600 BCE*homósWiktionary, Ancient Greek ὁμόςreconstructed
- Ancient Greekc. 800–300 BCEὁμόςWiktionary, Ancient Greek ὅμοιος‘same’
- Ancient Greekc. 800–300 BCEὅμοιοςWiktionary, English homoiothermalhómoios‘of like kind, similar’
- EnglishtodayhomoiothermalWiktionary, English homoiothermal
Linked words
through Proto-Indo-European *sem- ‘together, one’
some, single, similar, seem, simple, simply, soft, sam, simulation, sincerely, singular, resemble, assemble, resemblance, simultaneous, simulate, sincerity, semblance, anomaly, assimilate, synapse, anomalous, insincere, hyphen, simile, simulacrum, sempre, synchronise, 45 more
through Proto-Indo-European *somHós ‘same, alike’
through Ancient Greek ὁμός ‘same’
through Ancient Greek ὅμοιος ‘of like kind, similar’
Today it means
adj warm-blooded.
Sources
Sources: Wiktionary, “homoiothermal”; the older steps come from the Wiktionary entries for Proto-Indo-European *somHós, Ancient Greek ὁμός, Ancient Greek ὅμοιος. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / Proto-Indo-European *sem- / homoiothermal