A chamber in the mammalian kidney through which urine passes.
The outermost whorl of flower parts, comprising the sepals, which covers and protects the petals as they develop.
The crown containing the viscera of crinoids and similar echinoderms, entoprocts, and the polyps of some cnidarians.
A flattened cap of neuropil in the brain of insects.
A funnel-shaped expansion of the vas deferens or oviduct of insects.
An abnormal cavity or passage such as a fistula, leading from a deep-seated infection and discharging pus to the surface.
A bay of the sea; a recess in the shore.
An irregular venous or lymphatic cavity, reservoir, or dilated vessel.
Synonym of sine.
A rounded notch or depression between two lobes or teeth in the margin of a leaf or petal.
Relating to or denoting the sinoatrial node of the heart or its function of regulating the heartbeat.
A pouch or cavity in a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities (the paranasal sinus).