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Spermatophyta are heterosporous; fertilization of the egg cell is either through a pollen tube emitted by the microspore or (in a few gymnosperms) by spermatozoids. The phrase "flowering plants" is less distinctive than "seed plants," since the conifers, grasses, sedges, oaks, etc., do not produce flowers in the popula…

Covered or set with spherules; having one or more rows of spherules, or minute tubercles.

A small tube or spout inserted in a tree for conducting sap, as from a sugar maple.

One of the numerous small spinning tubes on the spinnerets of spiders.

n present, mostly arranged along the sides of the body. They generally live in burrows or tubes.

One of the external openings communicating with the air tubes or tracheæ of insects, myriapods, and arachnids. They are variable in number, and are usually situated on the sides of the thorax and abdomen, a pair to a segment. These openings are usually elliptical, and capable of being closed. See Illust. under Coleopte…

A tube or fuse for communicating fire to the chargen in blasting.

That through which anything spouts; a discharging lip, pipe, or orifice; a tube, pipe, or conductor of any kind through which a liquid is poured, or by which it is conveyed in a stream from one place to another; as, the spout of a teapot; a spout for conducting water from the roof of a building. Addison. "A conduit wit…

of air pump in which exhaustion is produced by a stream of mercury running down a narrow tube, in the manner of an aspirator; -- named from the inventor.

The shoot of a plant; a shoot from the seed, from the stump, or from the root or tuber, of a plant or tree; more rarely, a shoot from the stem of a plant, or the end of a branch.

A sudden or violent ejection or gushing of a liquid, as of water from a tube, orifice, or other confined place, or of blood from a wound; a jet; a spirt.

- Squirrel corn (Bot.), a North American herb (Dicantra Canadensis) bearing little yellow tubers. -- Squirrel cup (Bot.), the blossom of the Hepatica triloba, a low perennial herb with cup-shaped flowers varying from purplish blue to pink or even white. It is one of the earliest flowers of spring. -- Squirrel fish (Z…

A drop measurer; a glass tube tapering to a small orifice at the point, and having a bulb in the middle, used for finding the number of drops in equal quantities of different liquids. See Pipette. Sir D. Brewster.

(Milkweed family). They are succulent plants without leaves, frequently covered with dark tubercles giving them a very grotesque appearance. The odor of the blossoms is like that of carrion.

A widely diffused vegetable substance found especially in seeds, bulbs, and tubers, and extracted (as from potatoes, corn, rice, etc.) as a white, glistening, granular or powdery substance, without taste or smell, and giving a very peculiar creaking sound when rubbed between the fingers. It is used as a food, in the pr…

The cuckoopint, the tubers of which yield a fine quality of starch.

A narrowing of the opening or hollow of any passage, tube, or orifice; as, stenosis of the pylorus. It differs from stricture in being applied especially to diffused rather than localized contractions, and in always indicating an origin organic and not spasmodic.

lian moth (Doratifera vulnerans) whose larva is armed, at each end of the body, with four tubercles bearing powerful stinging organs. -- Sting ray. (Zoöl.) See under 6th Ray. -- Sting winkle (Zoöl.), a spinose marine univalve shell of the genus Murex, as the European species (Murex erinaceus). See Illust. of Murex.…

an unbounded stomach. Shak. Stomach pump (Med.), a small pump or syringe with a flexible tube, for drawing liquids from the stomach, or for injecting them into it. -- Stomach tube (Med.), a long flexible tube for introduction into the stomach. -- Stomach worm (Zoöl.), the common roundworm (Ascaris lumbricoides) foun…

Inordinate compression or constriction of a tube or part, as of the throat; especially, such as causes a suspension of breathing, of the passage of contents, or of the circulation, as in cases of hernia.