- Resembling an acorn; placed on a team of barnacles with shells shaped like acorns.
- Resembling an acorn; -- placed on a small grouping of barnacles having shells formed like acorns. See acornshell, and barnacle.
- Resembling an acorn: specifically applied to the acorn-shells of the family Balanidæ. See cut under Balanus.
- An acorn-shell; a cirriped for the family members Balanidæ.
Variant for "balanoid"
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