acyclic acyclic /eɪˈsaɪklɪk/

adjective

1. (chemistry) having an open chain structure  ( acyclic , open-chain )
   (chemistry) having an open chain structure
   
2. (botany) not cyclic; especially having parts arranged in spirals rather than whorls  ( acyclic )
   (botany) not cyclic; especially having parts arranged in spirals rather than whorls