protractor muscle

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• pedal protractor muscle — (MOLLUSCA: Bivalvia) The muscle that extends the foot …   Dictionary of invertebrate zoology

• Protractor — Pro*tract or, n. 1. One who, or that which, protracts, or causes protraction. [1913 Webster] 2. A mathematical instrument for laying down and measuring angles on paper, used in drawing or in plotting. It is of various forms, semicircular,… …   The Collaborative International Dictionary of English

• protractor — [prō′trak΄tər, prō trak′tər] n. [ML] 1. a person or thing that protracts 2. an instrument in the form of a graduated semicircle, used for plotting and measuring angles 3. Anat. a muscle that protracts, or extends, a limb …   English World dictionary

• protractor — /proh trak teuhr, preuh /, n. 1. a person or thing that protracts. 2. (in surveying, mathematics, etc.) an instrument having a graduated arc for plotting or measuring angles. 3. Anat. a muscle that causes a part to protrude. [1605 15; < ML; see… …   Universalium

• Muscle protractor pterygoidei et quadrati — The M. protractor pterygoidei et quadrati is a cranial muscle which pulls the streptostylic quadrate dorsorostrally in birds. Categories: Bird anatomy …   Wikipedia

• protractor — A muscle drawing a part forward, as antagonistic to a retractor; e.g., the serratus anterior muscle is a p. of the scapula; the lateral pterygoid muscle is a p. of the mandible. [L. pro traho, pp. tractus, to draw forth] * * * pro·trac·tor tər …   Medical dictionary

• protractor post-temporalis mechanism — a sound producing mechanism in certain catfishes, e.g. Bagridae. A muscle runs from the neurocranium to the anterior margin of the post temporo supracleithrum which is directly associated with the anterior process of the 4th parapophysis which in …   Dictionary of ichthyology

• protractor — noun Date: circa 1611 1. a. one that protracts b. a muscle that extends a part 2. an instrument for laying down and measuring angles in drawing and plotting …   New Collegiate Dictionary

• protractor muscles — 1. A contractile muscle that functions to extend an organ. 2. (NEMATA) Muscles attached to the stylet knobs or base and anteriorly to the body wall or head skeleton. 3. (SIPUNCULA) In adult Xenosiphon and some larval forms, an extra pair of… …   Dictionary of invertebrate zoology

• protractor — noun 1》 an instrument for measuring angles, typically in the form of a flat semicircle marked with degrees along the curved edge. 2》 chiefly Zoology a muscle serving to extend a part of the body. Compare with retractor …   English new terms dictionary

• protractor — pro•trac•tor [[t]proʊˈtræk tər, prə [/t]] n. 1) math. sur (in surveying, mathematics, etc.) an instrument having a graduated arc for plotting or measuring angles 2) one that protracts 3) anat. any muscle that serves to extend a part of the body;… …   From formal English to slang