Actinal

Pronunciation: /ˈæktɪnəl/

Definitions of actinal

adjective relating to or situated on the side of an animal or plant that is facing the axis, opposite to abactinal

Example Sentences

A1 The actinal side of the sea star is covered in tube feet.

A2 The actinal surface of the sea urchin is used for feeding and locomotion.

B1 The actinal rays of the starfish are used for capturing prey.

B2 The actinal plates of the sea cucumber are covered in tiny tube feet for movement.

C1 The actinal structures of echinoderms play a crucial role in their survival and reproduction.

C2 The intricate design of the actinal surface allows sea creatures to adapt to their environments effectively.

Examples of actinal in a Sentence

formal The actinal surface of the echinoderm is located on the underside of its body.

informal The actinal side of the starfish is the part that touches the ground.

slang I always forget which side of the sea urchin is the actinal side.

figurative In order to succeed, you must focus on the actinal aspects of your goals.

Grammatical Forms of actinal

• past tense: acted
• plural: actinals
• comparative: more actinal
• superlative: most actinal
• present tense: acts
• future tense: will act
• perfect tense: has acted
• continuous tense: is acting
• singular: actinal
• positive degree: actinal
• infinitive: to act
• gerund: acting
• participle: acted

Origin and Evolution of actinal

First Known Use: 1835 year

Language of Origin: Greek

Story behind the word: The word 'actinal' is derived from the Greek word 'aktinos' meaning ray or spoke.

Evolution of the word: Originally used in biology to describe structures or parts of an organism situated on the side of the body where the mouth is located. Over time, the term has been adopted in other fields such as chemistry and physics to refer to specific orientations or positions.