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flea	a tiny insect that does not have wings but can jump far. Fleas feed on the blood of the animals they bite.
foam	a lightweight, man-made material with many tiny air holes, used especially for packaging or for keeping things at a preferred temperature. [1/6 definitions]
fog	a thick mass, like a cloud, made up of tiny water drops floating in the air near the ground; mist. [1/4 definitions]
galaxy	a collection of billions of stars and other matter held together by gravity. Our planet Earth and the sun belong to the Milky Way galaxy. They are only tiny parts of this galaxy.
gene	a tiny section of a chromosome. A gene causes a particular characteristic, such as eye color or hair color, to be passed on from parent to offspring.
ghost	a slight possibility or tiny amount. [1/2 definitions]
grain	any tiny, hard piece of something. [1/4 definitions]
grit	tiny rough bits of sand or stone. [1/3 definitions]
ground¹	(always plural: grounds) tiny bits that settle at the bottom of a liquid. [1/9 definitions]
hair	a tiny amount. [1/3 definitions]
heather	an evergreen plant that has tiny pink or purple flowers that are shaped like bells.
hummingbird	a tiny, brightly colored bird with a long, slender bill and narrow wings that beat very rapidly.
insect	(informal) any tiny animal similar to true insects, such as a spider or centipede. [1/3 definitions]
islet	a tiny island.
microbe	A microbe is a tiny life form that can only be seen with a microscope. Many microbes are germs that cause disease.
microchip	a tiny plate of silicon that holds many electronic parts. Microchips are used to run computers and other devices.
minute²	very small in size or amount; tiny. [1/2 definitions]
mist	a mass or cloud of tiny water drops in the air. [1/4 definitions]
mite¹	a tiny animal that is related to the spider. Most mites are parasites and live on other animals or plants.
mite²	a tiny amount of something, such as money.
mole³	a small animal with tiny eyes and very soft fur that lives underground in tunnels. Moles are insectivores; they are mammals that eat insects. Different kinds of moles are found in Europe, Asia, and North America. [1/2 definitions]

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