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there's shortened form of "there is" or "there has."
thermal using, resulting from, or producing heat. [2 definitions]
thermometer an instrument for measuring temperature. Some thermometers are made of a closed glass tube containing mercury or alcohol that rises or falls as the temperature rises or falls.
Thermos (Trademark) A Thermos is a container that is used to keep food or drink at its original temperature. [2 definitions]
thermostat a device that controls temperature automatically. Thermostats may be found in houses, cars, ovens, and refrigerators.
thesaurus a book that lists words with their synonyms or antonyms.
these plural of this.
they those people, animals, or things being pointed to. [4 definitions]
they'd shortened form of "they had" or "they would."
they'll shortened form of "they will."
they're shortened form of "they are."
they've shortened form of "they have."
thick large in measurement from one side of a surface to the opposite side; not thin in the smallest dimension of something. [6 definitions]
thicken to make or become thick or thicker.
thicket a thick patch of shrubs, bushes, or small trees.
thickness the fact or quality of being thick. [3 definitions]
thief someone who steals.
thigh the part of the human leg between the hip and the knee.
thighbone the long bone between the hip and the knee.
thimble a small cup worn to protect the finger that pushes the needle through cloth when sewing. A thimble is usually made of a hard material such as metal or plastic.
thin small in the measure from one side of a surface to the other; not thick. [9 definitions]