polycyclic
/ˌpɒlɪˈsʌɪklɪk
/ /ˌpɒlɪˈsɪklɪk/adjective
1Relating to or resulting from many cycles.In a screen for defective courtship songs, the nonA diss mutant was identified by its abnormal pulse songs, which become increasingly polycyclic and very high in amplitude during a song burst....
- Interestingly, the latter's mutant song phenotype shows similarities to the wild-type songs of the D. virilis group of species, which has song pulses that are more polycyclic than those of D. melanogaster.
1.1 Chemistry (Of an organic compound) having several rings of atoms in the molecule: polycyclic aromatic hydrocarbons...
- The respirable portion of particulates can include acid condensates, sulfates, nitrates, and organic compounds (e.g., polycyclic aromatic hydrocarbons).
- The molecules, called polycyclic aromatic hydrocarbons, are common in interstellar space, and many believe they were among the raw materials for life.
- Chronic exposure to polycyclic aromatic compounds in dusts produced at the plant was suggested as a possible factor in the disease excesses.
1.2 Geology (Of a landform or deposit) having undergone two or more cycles of erosion and deposition: there is evidence for polycyclic material in both samples...
- Some structural, petrological and isotopic evidence suggests multi-stage and possibly polycyclic metamorphic evolution of the granulites of the Eastern Ghats belt.
- Chert fragments are likely to be polycyclic but originally derived from obducted deep-sea strata.
- The pervasively and multiply deformed polycyclic high-grade metamorphic rocks make it difficult to reconstruct the original evolutionary history of the Mozambique belt.
Rhymes
- echiuroid
- echo
- echo boom
- echo boomer
- echocardiogram
- echocardiograph
- echocardiographic
- echocardiography
- echo chamber
- echoencephalogram
- echoencephalograph
- echoencephalographic
- echoencephalography
- echoer
- echoey
- echogram
- echograph
- echoic
- echoically
- echolalia
- echoless
- echolocation
- echopraxia
- echo sounder
- echo-sounding