| bilinear | (adjective) linear with respect to each of two variables or positions | - |
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| collinear | (adjective) lying on the same line | - |
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| curvilinear | (adjective) characterized by or following a curved line | Synonyms: curvilineal |
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| interlinear | (adjective) written between lines of text | Synonyms: interlineal |
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| linear | (adjective) of or in or along or relating to a line; involving or having a single dimension | Synonyms: one-dimensional |
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| (adjective) designating or involving an equation whose terms are of the first degree | Synonyms: additive |
| (adjective) of a circuit or device having an output that is proportional to the input | Synonyms: analog, analogue |
| (adjective) measured lengthwise | Synonyms: running |
| (adjective) (of a leaf shape) long and narrow | Synonyms: elongate |
| matrilinear | (adjective) based on or tracing descent through the female line | Synonyms: matrilineal |
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| near | (adjective) not far distant in time or space or degree or circumstances | Synonyms: close, nigh |
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| (adjective) closely resembling the genuine article | - |
| (adjective) with or in a close or intimate relationship | Synonyms: dear, good |
| (adjective) being on the left side | Synonyms: nigh |
| (adjective) giving or spending with reluctance | Synonyms: cheeseparing, close, penny-pinching, skinny |
| (adjective) very close in resemblance | Synonyms: approximate |
| nonlinear | (adjective) designating or involving an equation whose terms are not of the first degree | - |
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| patrilinear | (adjective) based on or tracing descent through the male line | Synonyms: patrilineal |
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| rectilinear | (adjective) characterized by a straight line or lines | Synonyms: rectilineal |
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