The Collaborative International Dictionary
Surculation
Surculation \Sur`cu*la"tion\, n. Act of purning. [Obs.]
Douglas Harper's Etymology Dictionary
surculation
"act of pruning," 1660s, noun of action from past participle stem of Latin surculare "chear of shoots or twigs," from surculus "tender young shoot, twig, sprout, sucker."
Wiktionary
surculation
n. (context obsolete English) purring