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spinning wheel a simple machine for spinning thread or yarn that has a single spindle driven by a large wheel.
spin-off something that results from the production or operation of another thing. [2 definitions]
spin off of products, to come into being as the result of the creation of other products.
spinose bearing or covered with spines; spiny.
spinster a woman who has never married (sometimes used disparagingly).
spinto of a singer's voice, both lyric and dramatic.
spiny having or covered with spines or similar projections; thorny. [3 definitions]
spiny anteater the echidna.
spiny-finned having fins that are supported by spinelike, bony rays.
spiny lobster any of several edible crustaceans having a spiny shell and lacking the large pincers of the true lobsters.
spiracle an opening or hole that allows for the passage of air for breathing or ventilation; air hole. [3 definitions]
spiral a curve that begins from and continues to form a circle around a fixed point and that constantly increases or decreases in distance from it, in either a flat or a three-dimensional plane; coil or helix. [6 definitions]
spirant in phonetics, a consonantal speech sound produced by the breath pushed through the constricted opening of the mouth and lips, as the "sh" or "v" sound in English; fricative. [2 definitions]
spire1 a tall, narrow, cone-shaped roof or upward projection on a building or outer wall; steeple; pinnacle. [3 definitions]
spire2 a spiral or helix. [2 definitions]
spirea any of several shrubs related to the roses and bearing small clusters of small pink or white flowers.
spirillum any of several spiral-shaped, aerobic bacteria having flagella, or any of various other related organisms.
spirit the vital force that is thought to be an element of human beings; soul. [12 definitions]
spirited full of vigor, courage, or enthusiasm.
spirit gum a special type of glue used in the theater to fasten false hair or whiskers to an actor's face.
spiritism spiritualism.