Meanings

marginal profit

law of diminishing marginal utility

marginal propensity to consume

law of diminishing marginal product

marginal efficiency of investment

space-time

pure land

ten spiritual realms

Universal Time

spiritual realm of humanity

subkingdom

Roche limit

Ecumenical Movement

worlds of the ten directions

Seven Wonders of the World

Old World monkey (any monkey of family Cercopithecidae)

New World monkey (any monkey of infraorder Platyrrhini)

critical angle

world line

world tree (religious or mythological motif)