Definition: Relating to a type of small, dry fruit that does not open to release its seeds.

Example: The achenial characteristics of the plant were studied in detail.

Definition: A type of flowering plant that belongs to the genus Achillea, commonly known as yarrow, which is often used in herbal medicine and gardening.

Example: The garden was filled with achillea, attracting many butterflies.

Definition: A thin, needle-shaped part or structure found in some plants and animals, as well as in certain minerals.

Example: The acicula of the pine tree are sharp and can easily pierce the skin.

Definition: Having a shape that is long and thin, similar to a needle.

Example: The acicular crystals formed in the solution were fascinating to observe under the microscope.

Definition: Having a shape that resembles a needle, typically long and thin.

Example: The aciform leaves of the plant give it a unique appearance.

Definition: A type of plant that is often poisonous, known for its tuberous roots and distinctive blue or white flowers. It has been used in the past for medicinal purposes, particularly for pain relief.

Example: The herbalist warned against using aconite due to its toxic properties.

Definition: A type of plant that belongs to the buttercup family, known for its beautiful flowers and toxic properties. It is often referred to as monkshood or wolfsbane.

Example: The aconitum plant is often found in mountainous regions and is known for its striking blue flowers.

Definition: A type of nut that comes from an oak tree, which has a hard shell and is often found in a cup-like base.

Example: The squirrel buried an acorn in the ground for the winter.

Definition: Describing something that is filled with or has a lot of acorns.

Example: The squirrels were busy gathering acorned nuts for the winter.

Definition: A measurement of land area that is equal to 43,560 square feet, often used to describe large plots of land.

Example: The farmer owns a large acreage of land for growing crops.