extra, scraps
An organism's remnant or leftover is referred to as a fossil.
Neutron star
After fertilization, most of the leftover sperm are blocked from entering the already fertilized egg by a protective barrier. The sperm cells that do make it through generally don't contribute to the genetic material of the embryo.
After a high mass star explodes, the leftover material forms a remnant called a neutron star or a black hole. If the core of the star is less than about 3 times the mass of the Sun, it collapses to form a neutron star. If the core is more massive, it collapses further, causing the gravitational collapse to form a black hole.
Yes, comets are believed to be made of leftover material from the early solar system, including ice, gas, dust, and rock. They are considered to be remnants from the formation of the sun and planets billions of years ago.
A leftover piece of material is commonly referred to as a scrap.
offcuts
A material scrap is typically referred to as a waste material, leftover material, or remnant.
Scrap
Waste
Leftover material is called scrap.
Residue or remnants.
extra, waste, scrap
extra, waste, scrap
An organism's remnant or leftover is referred to as a fossil.
It is thought that Asteroids are leftover material from unfinished planets.
One option for leftover butcher block material is to repurpose it for smaller projects such as cutting boards, coasters, or shelves. You could also consider donating it to a woodworking shop or using it as a decorative element in your home.