yūdōkaseki
1. derived fossil
Noun
1. derived fossil
1. fossil
2. petrifaction; petrification
1. guidance; leading
1. Not a fossil.; Not fossilized.
1. Fossil.; It is a fossil.
1. with fossils; made of fossils
1. Was a fossil.
1. Was not a fossil.; It wasn't a fossil.
1. Not a fossil.; Is not a fossil.
1. If it's a fossil; When it's a fossil