The hypothalamus contains special cells called neurosecretory cellsâneurons that secrete hormones: 1  Thyrotropin-releasing hormone (TRH) 2  Growth hormone-releasing hormone (GHRH) 3  Growth hormone-inhibiting hormone (GHIH) 4  Gonadotropin-releasing hormone (GnRH) 5  Corticotropin-releasing hormone (CRH) 6  Oxytocin. 7  Antidiuretic hormone (ADH)
Meaning: Platform for a lookout at or near the top of a mast. Classified under: Nouns denoting man-made objects. Hypernyms (crow's nest is a kind of...): platform (a raised horizontal surface) Holonyms (crow's nest is a part of...): ship (a vessel that carries passengers or freight)
Crow's nest on a tugboat. A crow's nest is a structure in the upper part of the main mast of a ship or a structure that is used as a lookout point. This position ensured the best view for lookouts to spot approaching hazards, other ships, or land. It was the best device for this purpose until the invention of radar.