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Substantiivi

1. (anatomy) The deltoid muscle, a triangular muscle on the human shoulder.
2. (anatomy) The deltoid ligament, a triangular ligament on the human ankle.
3. (geometry) A kite (quadrilateral having two pairs of edges of equal length, the edges of each pair touching each other at one end).
4. (geometry) A deltoid curve (hypocycloid with three cusps).

Adjektiivi

1. In the shape of the uppercase Greek letter delta (Δ); triangular.
2. (botany, of leaves) Of a triangular or roughly triangular shape and attached to the stem via the side.
3. Of or pertaining to the deltoid muscle.