actinoid

• Adjetivo raro ou arcaico que significa ter forma ou estrutura radiada, semelhante a uma estrela ou a raios; também pode se referir a algo relacionado a actínios ou actinoides, mas nesse sentido o uso é técnico e pouco comum.

An obsolete adjective meaning having a radiated form or structure, like a star or ray; rarely used in modern English.

1. Relating to the actinide seriesC2formalscientific

   Pertaining to the series of radioactive metallic elements with atomic numbers 89 through 103 (actinium through lawrencium).

   Actinídeo

   • Actinoid elements are typically found in the bottom row of the periodic table.
   • The chemical properties of actinoid compounds are complex.
   • Research on actinoid materials is important for nuclear science.

   Sinônimosactinide

2. Having a radial formC2formalscientific

   Describing a shape or structure that radiates outward from a central point, like a star or a sea creature.

   Actinoide

   • The coral had an actinoid form, with tentacles spreading in all directions.
   • Some microscopic organisms exhibit an actinoid symmetry.
   • The artist's sculpture had an actinoid design, with arms extending from a central core.

   Sinônimosradialradiateradiatingstar-shapedstellate

• Substantivo que designa qualquer um dos elementos metálicos radioativos com números atômicos de 89 a 103, ou adjetivo que descreve algo com forma radial ou semelhante a raios.

A noun referring to any of a series of radioactive metallic elements with atomic numbers from 89 to 103, or an adjective describing something with a radial form.

1. Radioactive element seriesC2formalscientific

   Any of a series of radioactive metallic elements with atomic numbers ranging from 89 (actinium) to 103 (lawrencium).

   Série dos actinídeos

   • Uranium and plutonium are well-known actinoids used in nuclear energy.
   • The actinoid series includes elements that are all radioactive.
   • Scientists study the chemical properties of actinoids for research purposes.

   Sinônimosactinideactinide series

2. Radial formC2formalscientific

   Having a structure or form that radiates outward from a central point.

   Forma radial

   • The starfish exhibits an actinoid symmetry in its body plan.
   • Certain crystals display an actinoid arrangement of their facets.
   • The artist created an actinoid pattern with lines spreading from the center.