the starting point

start of an event or action

an oval object with a shell, as produced by a bird

seed, cell; embryo of an animal

a small part of a plant or fruit from which another plant can grow; a cause or origin (of something); semen

beginning, source

the fertilizing fluid produced by male animals

beginning, source

the fertilizing fluid of a male animal

beginning, source

a single cell by which a flowerless plant (e.g. moss, a fern) reproduces itself

beginning, source