acyclic

[ey-sahy-klik, ey-sik-lik] /eɪˈsaɪ klɪk, eɪˈsɪk lɪk/
adjective
1.
not cyclic:
an acyclic flower; acyclic compounds.
2.
Chemistry. of or pertaining to a compound that does not contain a closed chain or ring of atoms (contrasted with cyclic).
Origin
1875-80; a-6 + cyclic
British Dictionary definitions for acyclic

acyclic

/eɪˈsaɪklɪk; eɪˈsɪklɪk/
adjective
1.
(chem) not cyclic; having an open chain structure
2.
(botany) having flower parts arranged in a spiral rather than a whorl
acyclic in Science
acyclic
  (ā-sī'klĭk, ā-sĭk'lĭk)   

  1. Not cyclic. Used especially of flowers whose parts are arranged in spirals rather than in whorls, as in magnolias.

  2. Having an open-chain molecular structure rather than a ring-shaped structure.