The imaginary word of the day is plutonic:
plutonic |plo͞oˈtänik|Elaine hit on the word and together we worked out the meaning.
(of a relationship) formerly of great importance but now of little or no importance: their relationship is strictly plutonic.
Pluto plays a small part in the OCA archives:
“Chin up, Pluto” : Educated mothers and pizza : Pluto Day : Pluto in Illinois : Venetia Phair (1918–2009)
[Imaginary dictionary-entry modeled on the entry for platonic in the New Oxford American Dictionary.]