| fluctuation | | |
| n. (event) | 1. fluctuation | a wave motion.; "the fluctuations of the sea" |
| ~ undulation, wave | (physics) a movement up and down or back and forth. |
| n. (event) | 2. fluctuation, variation | an instance of change; the rate or magnitude of change. |
| ~ alteration, change, modification | an event that occurs when something passes from one state or phase to another.; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago" |
| ~ vicissitude | a variation in circumstances or fortune at different times in your life or in the development of something.; "the project was subject to the usual vicissitudes of exploratory research" |
| ~ allomerism | (chemistry) variability in chemical composition without variation in crystalline form. |
| ~ deviation, departure, difference, divergence | a variation that deviates from the standard or norm.; "the deviation from the mean" |
| ~ permutation, substitution, switch, transposition, replacement | an event in which one thing is substituted for another.; "the replacement of lost blood by a transfusion of donor blood" |
| ~ business cycle, trade cycle | recurring fluctuations in economic activity consisting of recession and recovery and growth and decline. |
| ~ daily variation | fluctuations that occur between one day and the next. |
| ~ diurnal variation | fluctuations that occur during each day. |
| ~ tide | something that may increase or decrease (like the tides of the sea).; "a rising tide of popular interest" |
| n. (attribute) | 3. fluctuation, wavering | the quality of being unsteady and subject to changes.; "he kept a record of price fluctuations" |
| ~ unregularity, irregularity | not characterized by a fixed principle or rate; at irregular intervals. |
| ~ scintillation | the twinkling of the stars caused when changes in the density of the earth's atmosphere produce uneven refraction of starlight. |
| seesaw | | |
| n. (artifact) | 1. dandle board, seesaw, teeter, teeter-totter, teeterboard, teetertotter, tilting board | a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end. |
| ~ playground | yard consisting of an outdoor area for children's play. |
| ~ plaything, toy | an artifact designed to be played with. |
| v. (motion) | 2. seesaw, teeter-totter, teetertotter | ride on a plank. |
| ~ play | participate in games or sport.; "We played hockey all afternoon"; "play cards"; "Pele played for the Brazilian teams in many important matches" |
| v. (motion) | 3. seesaw | move up and down as if on a seesaw. |
| ~ move | move so as to change position, perform a nontranslational motion.; "He moved his hand slightly to the right" |
| v. (motion) | 4. seesaw, teeter, totter | move unsteadily, with a rocking motion. |
| ~ move | move so as to change position, perform a nontranslational motion.; "He moved his hand slightly to the right" |
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