noun A protuberant, usually hollow structure, notably: The undersurface of the abdomen of an arthropod. The swollen basal portion of an archegonium in which an egg develops.
noun The undersurface of the abdomen of an arthropod.
noun The swollen basal portion of an archegonium in which an egg develops.
noun A broad, shallow concavity, notably of a bone.
noun One who vents, who is vocal about feelings or problems.