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| air bladder |
an air-filled sac in various animals and plants, esp. such a structure located near the spine of certain fish that functions to maintain buoyancy by regulating hydrostatic pressure. (See swim bladder.) |
| amnion |
a thin membranous sac, filled with a watery fluid, that contains the embryo of a mammal, bird, or reptile. |
| ascomycete |
a fungus of a type that reproduces through spores developed in a sac, such as the yeasts, mildews, and truffles. |
| bladder |
an expandable sac or pouch in humans and animals in which gas or liquid, esp. urine, collects. [3 definitions] |
| blind alley |
an alley or passageway with one end closed off; cul-de-sac. [1/2 definitions] |
| bursa |
a sac in the body, esp. one filled with fluid, that acts to protect against friction, as in a joint. |
| conceptus |
all of the parts produced during the period from conception through birth, such as the fetus, the fetal sac, and the umbilical cord. |
| -cyst |
sac; cavity; vesicle; bladder. |
| cyst |
a fluid-filled vesicle or sac within body tissue, sometimes a pathological development but most often not. [1/3 definitions] |
| cysticercus |
the larva of any of several tapeworms, consisting of a headlike part enclosed in a fluid-filled sac; bladderworm. |
| cysto- |
bladder; sac. |
| diverticulitis |
painful inflammation of a sac that branches off from a hollow organ, esp. the intestine. |
| diverticulum |
a tubular pouch or sac that branches out from a body canal, organ, or cavity, occurring as a normal or abnormal growth. |
| endosperm |
tissue that is derived from the embryo sac of a plant and that surrounds and nourishes the embryo. |
| enucleate |
to remove from a sac, used esp. in reference to a tumor or an organ such as an eye. [1/2 definitions] |
| enucleation |
the removal of something, such as a tumor or an organ, from a sac. [1/2 definitions] |
| epicardium |
the inner layer of the thin membranous sac that surrounds the heart. (See pericardium.) |
| follicle |
a small cavity or sac with a narrow mouth, such as that surrounding the root of each hair. [1/3 definitions] |
| gallbladder |
a small muscular sac that is attached to the liver and that stores bile. |
| musk |
a strong-smelling secretion produced in a glandular sac underneath the skin of the male musk deer's abdomen. [1/3 definitions] |
| pericardium |
in vertebrates, the membranous sac enclosing the heart. |
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