Meanings

money comes and goes

chemical messenger

neurotransmitter

leaflet

presenting no difficulty

astrobiology

botanical genus

benefit in kind

animal cell

Burgess fauna (animal fossils found in the Burgess Shale)

implements used to enhance the effect of a play (e.g. props, costumes, etc.)

lichen

hydroxide ion

biologism

volcanic sublimate

law of one price

amount of substance

multicellular organism

biomolecular

evolutionary biology