di·am·e·ter (d - m  -t r)n. 1. Abbr. d or diam. Mathematics a. A straight line segment passing through the center of a figure, especially of a circle or sphere, and terminating at the periphery. b. The length of such a segment. 2. Thickness or width. 3. A unit for measuring the magnifying power of a microscope lens or telescope, equal to the number of times an object's linear dimensions are apparently increased. [Middle English diametre, from Old French, from Latin diametrus, from Greek diametros (gramm  ), diagonal (line) : dia-, dia- + metron, measure; see m-2 in Indo-European roots.]di·am e·tral (-trl) adj. |
diametral [daɪˈæmɪtrəl]
adj
1. (Mathematics) located on or forming a diameter diametral plane
2. (Mathematics) a less common word for diametric
diametrally adv
ThesaurusLegend: Synonyms Related Words Antonyms
| Adj. | 1. | diametral - related to or along a diameter; "the diametral plane" |
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