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Glite Dictionary
⭐ Star-shaped ☢️ Radioactive elements
actinoid

actinoid

9.9
Having a star-shaped form like a starfish or many flowers
  • adjective
  • /ˈæktɪnɔɪd/
  • Specialized
translation icon : actinoide
  • The starfish has an actinoid body structure, with arms radiating from a central disc.

Examples

  • Many flowers exhibit an actinoid symmetry, making their petals appear like rays.

  • The actinoid structures in the coral were fascinating.

  • Scientists compared the actinoid forms of ancient fossils to modern sea urchins.

  • Many actinoid forms can be observed in marine life.

  • Many flowers exhibit an actinoid symmetry, making their petals appear like rays.

  • The starfish has an actinoid body structure, with arms radiating from a central disc.

  • Scientists compared the actinoid forms of ancient fossils to modern sea urchins.

Synonyms

star-shaped
vsactinoid
3 3.4

Having the shape of a star with points coming from the center

is used mainly for radial forms in biological structures rather than general shapes
actinomorphous
vsactinoid
  • Specialized
9.9

Able to be cut into equal halves by any straight line through the center, like a daisy

is a general radial or star-like form rather than strict symmetry
actinomorphic
vsactinoid
  • Specialized
9.9

A flower that can be divided into similar halves by any line through its center

is a broader radial or star-like form not limited to flowers

Surface Forms

actinoid positive

Morphology

actinoid = actin (semi-transparent) = actin + oid

Built from the combining form actin- ('ray') + '-oid' ('-like'), so 'ray-like' or 'star-shaped' is accessible in principle but the root is not common knowledge.

Etymology

The word actinoid comes from the Greek root aktis/aktinos meaning 'ray' and the ending -oid meaning 'resembling'. So something actinoid looks like rays coming from a centre, which is why we use the word for star-shaped or radial forms.