Hydreliumlithylliumboronarbonitroxygenfluoronsosiumaluiliconphosphorulfurchlargonpotium
Inflections the Mesoperiodic Table of Elements
A single continuous word formed by fusing the names of the first twenty elements of the periodic table in atomic-number order, each name run together with and partially elided into the one following; the verbal collapse of an ordered series of element names into one unbroken term.
Specifically, the telescoped run from hydrogen through calcium, in which adjacent element names share or drop letters at their seams (as in hydrogen + helium yielding 'hydrelium', or chlorine + argon yielding 'chlargon').
“'Chlargon' is where chlorine and argon meet in the mesoperiodic string.”
— Professor Sendy
By extension, any practice of reciting an ordered scientific or numerical sequence as one elided, breathless portmanteau rather than as discrete terms.
“He read the whole list mesoperiodically, in one breath, with no spaces.”
— Professor Sendy
“Behold the Mesoperiodic Table of Elements: Hydreliumlithylliumboronarbonitroxygenfluoronsosiumaluiliconphosphorulfurchlargonpotium.”
— Professor Sendy
Inflections mesoperiodic
Of or relating to the fused, gapless form of the periodic table in which the separate cells of element names are merged into a single uninterrupted word.
“On the mesoperiodic table the elements are not arranged in cells but melted into one word.”
— Professor Sendy
Synonyms
Word History
The Combo
hydrogen helium lithium beryllium boron carbon nitrogen oxygen fluorine neon sodium magnesium aluminum silicon phosphorus sulfur chlorine argon potassium calcium Hydreliumlithylliumboronarbonitroxygenfluoronsosiumaluiliconphosphorulfurchlargonpotium
oined by Professor Sendy (2026) as a "mesoperiodic" portmanteau telescoping the names of the first twenty chemical elements of the periodic table into a single word, each element's name overlapping or eliding into the next: hydrogen + helium + lithium + beryllium + boron + carbon + nitrogen + oxygen + fluorine + neon + sodium + magnesium + aluminum + silicon + phosphorus + sulfur + chlorine + argon + potassium + calcium. The prefix element "meso-" (Greek mesos, "middle") in Sendy's framing denotes a hybrid table in which the discrete cells of the conventional periodic chart are fused into one continuous string.
First Known Use 2026
Coinage credited to Professor Sendy.
Attested in the source utterance, @ProfessorSendy ↗
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