Pliny distinguishes between Prunus, the plum fruit, and Cerasus, the cherry fruit. Already in Pliny quite a number of cultivars are cited, some possibly species or varieties, Aproniana, Lutatia, Caeciliana, and so on.
To rincon is to habitually decline every invitation to do something no matter the circumstance. This includes, but is not limited to, social events such as lunch with coworkers, drinks at a bar, camping, sporting events, or anything else with an invitation that could be declined.
intron inÂ·tron (Ä­n'trÅn) n. A segment of a gene situated between exons that does not function in coding for protein synthesis. After transcription of a gene to messenger RNA, the transcriptions of introns are removed, and the exons are spliced together by enzymes before translation and assembly of amino acids into proteins. Compare exon.