真

true fruit (i.e. one that forms from the ovary only)

Zoology

eusociality

vacuum vessel; vacuum chamber

dead center; dead centre; right in the middle

circularity; roundness

Geology

pearly lustre; pearly luster; iridescence

day on which the temperature stays below 0°C; cold winter's day

pure water; clear water

mallard (Anas platyrhynchos); mallard duck

yellowfin goby (Acanthogobius flavimanus)

vacuum cleaner

vacuum packaging

pearl culture

Japanese kelp (Laminaria japonica)

greater white-fronted goose (Anser albifrons)

evergreen (esp. one planted or used at a shrine)

mockingbird

southerly breeze

true wind

mother-of-pearl

Otani sect of Shinshu

truth-function

pearl work

Eurasian siskin (species of songbird, Carduelis spinus)

fact-finding