What does "retinaculum" mean?

Retinaculum: (Zoöl) One of the retractor muscles of the proboscis of certain worms.

Additional senses

  1. 2.(Bot.) A small gland or process to which bodies are attached; as, the glandular retinacula to which the pollinia of orchids are attached, or the hooks which support the seeds in many acanthaceous plants.

Sources