het·er·o·cyst 
(hĕtər-ə-sĭst′)
(hĕtər-ə-sĭst′)n.
A large, thick-walled, nitrogen-fixing cell that occurs at intervals along the filaments of certain cyanobacteria.
- thyreophoran
- thyro-
- thyrocalcitonin
- thyroglobulin
- thyroid
- thyroidal
- thyroid-binding globulin
- thyroid cartilage
- thyroidectomy
- thyroid gland
- thyroid hormone
- thyroiditis
- thyroid-stimulating hormone
- thyrotoxicosis
- thyrotrophic
- thyrotrophin
- thyrotropic
- thyrotropin
- thyrotropin-releasing hormone
- thyroxin
- thyroxine
- thyroxine-binding globulin
- thyrse
- thyrsus
- thysanuran