Dictionary

director circle en · NOUN

Pronunciation

/-ʈəɾ-/ (India)
/dəi̯-/ (Scotland)
/dɪˌɹek.tə ˈsɜː.kəl/ (Australia)
/daɪ̯-/ (Canada, General-American)
/dɑe̯-/ (New-Zealand)
/dʌɪ̯-/ (Received-Pronunciation)
/dəˌɹek.tə ˈsøː.kəl/ (New-Zealand)
/dɪˌɹɛk.təɾ ˈsɪɾ.kəl/ (Scotland)
/ɖɑːj-/ (India)
/daɪ̯-/ (Received-Pronunciation)
/-ˈsəɾ-/ (India)
/ɖɪˌɾɛ(ː)k.ʈɜː(ɾ)ˈsɜː(ɾ).kel/ (India)
(Southern-England) audio
/ɖəj-/ (India)
/dɪˌɹɛk.təɹ ˈsɜɹ.kəl/ (Canada, General-American)
/dɑe̯-/ (Australia)
/dɪˌɹɛk.təɾ ˈsɪɾ.kʌl/ (Scotland)
/dɪˌɹek.tə ˈsɜː.kəl/ (Received-Pronunciation)
/dʌi̯-/ (Scotland)
dī-
dĭ-rĕk′tər sûr′kəl
/dɪˌɹɛk.tə ˈsɜː.kəl/ (Received-Pronunciation)

Meanings

A circle formed by all 90° crossings of tangents of an ellipse or hyperbola.

Forms

Spelling	Features	Labels	Source
director circles	Number=Plur		lexicographic

director conic

Synonyms

orthoptic circle · Fermat-Apollonius circle

Translations (3)

pt círculo diretor (circle formed by all 90° crossings of tangents of an ellipse or hyperbola) · es círculo director (circle formed by all 90° crossings of tangents of an ellipse or hyperbola) · ja 準円 (circle formed by all 90° crossings of tangents of an ellipse or hyperbola)

wikidata: Q5280532