Plants are multicellular organisms in the kingdom Plantae that produce their own food through photosynthesis. There are about 300,000 plant species, with grasses, trees, and shrubs being notable examples. Plants are embryophytes, which include vascular plants, liverworts, hornworts, and mosses in the strictest meaning. Green algae were considered a plant in certain less strict references.
Botany, often known as plant science(s), plant biology, or phytology, is a discipline of biology that studies plants. A botanist, plant scientist, or phytologist is a specialist in this subject of science. The word "botany" comes from the Ancient Greek word βοτ?vη (botan?), which means "pasture," "herbs," "grass," or "fodder," and is derived from β?σκειν (boskein), which means "to feed" or "to graze."