-crum

(Latin: a suffix; result of the act of, means of)

ambulacrum

One of the five radial areas on the undersurface of the starfish and similar echinoderms, from which the tube feet are protruded and withdrawn.

fulcrum

1. The point or support on which a lever pivots.
2. In zoology, an anatomical structure that acts as a hinge or a point of support.
3. An agent through which vital powers are exercised.

sacrum

The large heavy bone at the base of the spine, which is made up of fused sacral vertebrae.

The sacrum is located in the vertebral column, between the lumbar vertebrae and the coccyx. It is roughly triangular in shape and makes up the back wall of the pelvis.

The female sacrum is wider and less curved than the male.

simulacrum

1. A representation or image of something.
2. Something which has a vague, tentative, or shadowy resemblance to something else.

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-crum

(Latin: a suffix; result of the act of, means of)

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