from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A highly potent form of marijuana obtained from unpollinated female plants.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A technique of growing cannabis where only the female is allowed to blossom. Without pollen from the male plant, the female blossoms produce no seeds, forming large panicled flowers that have a high content of cannabinoids, found in THC.
Spanish : sin, without (from Latin sine) + semilla, seed (from Old Spanish dialectal semilia, alteration of Late Latin sēminia, neuter pl. of sēminium, from sēmen; see semen).(American Heritage® Dictionary of the English Language, Fourth Edition)
From Spanish sin semilla ("without seeds (aka "seedless")") (Wiktionary)