Stoma, n. From a Greek word meaning “mouth-opening”; a small opening in the skin of leaves and young stems leading to the air cavities within the plant; a breathing pore.
Stomata, n. The plural of “stoma.”
Strengthening cells, n. The cells with tough or hard walls that serve to give firmness and support to plant tissues.
Suction, n. L. sugere, to suck; the process of sucking.
Sulphur, n. A solid substance found in the earth’s crust in certain places; it is one of the constituents of protoplasm, and although occurring in it in very small quantities, it is essential.
Sulphuric acid, n. Oil of vitriol, a combination of hydrogen, sulphur, and oxygen. Sulphuric acid is found in the earth and in the air in very small quantities, and is the source from which plants as a rule derive their sulphur.
T.
Tertius, n. L. tertius, third; the name given in this book to a suppositional plant.
Thoreau, n. Henry David Thoreau, an American author of the present century, wrote a number of delightful books on nature.
Tissue, n. L. texere, to weave; a woven fabric; the cellular fabric of plant structures.