| PITUITARY | Gland at the base of the brain |
| THYMUS | Lymphoid gland at the base of the neck; that of lambs and calves, when used for food, is called a sweetbread (6) |
| THYROID | Gland at the base of the neck (7) |
| THYMIC | Pertaining to a gland at the base of the neck |
| THALAMUS | Either of the two contiguous egg-shaped masses of grey matter at the base of the brain (8) |
| CHIASMA | Intersection or crossing-over, as of the optic nerves at the base of the brain (7) |
| THALAMI | What are the two egg-shaped masses of grey matter at the base of the brain |
| HYPOTHALAMUS | A neural control centre at the base of the brain, concerned with hunger, thirst and other autonomic functions |
| ADRENAL | _ gland, an endocrine gland at the anterior end of each kidney (7) |
| TONSILS | Lymph glands at the root of the tongue (7) |
| THYMI | Glands at the root of the neck which become vestigial in adulthood |
| TONSIL | Gland at root of tongue (6) |
| OVARY | Gland at one end of a fallopian tube |
| PALM | The inner surface of the hand from the wrist to the base of the fingers. |
| INION | Most prominent projection of the occipital bone at the base of the skull, used as a point of measurement in craniometry (5) |
| PILEUM | Top part of a bird's head, from the base of the bill to the nape of the neck (6) |
| SPHENOID | Butterfly-shaped bone at the base of the cranium featuring a depression, the sella turcica, that contains the pituitary gland (8) |
| PUBIS | Either of a pair of bones forming the frame at the base of the spine (5) |
| CERE | In birds such as the parrot, the waxy structure at the base of the beak that contains the nostrils (4) |
| RABBITPUNCH | A sharp blow to the back of the head or to the base of the skull that can cause serious injury (6,5) |
