reversing ppl adjective. [rɪ'vǝ:sɪŋ] E19.
[formed as REVERSIBLE + -ING².]
1. Esp. of part of a machine: that reverses or causes reversal. E19.

2. Of the nature of or characterized by reversal (of an action, process, etc.). L19.
Special collocations: reversing falls a waterfall or rapid in a narrow river mouth over which water flows backwards as the tide comes in. reversing layer (now rare) a region of the solar atmosphere above the photosphere, formerly thought to be responsible for bringing about reversal of emission lines in the solar spectrum to absorption lines. reversing mill a rolling-mill in which sheet metal may be passed between the same rollers in both directions. reversing propeller a reversible propeller. reversing stratum = reversing layer above. reversing thermometer a thermometer the mercury thread of which breaks when inverted, so retaining the registered reading, used esp. for deep-water measurements.

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