【医】 blastopore rest
foramen
【医】 blastopore; gastropore; of Rusconi anus; primitive mouth; protostoma
Rusconi's anus
residue; leavings; overmeasure; overplus; remain; remainder; remnant; spare
surplus
【医】 R.; residue; residuum; rest; vestige; vestigium
【经】 overplus