epactn.

Brit.

/ˈiːpakt/,

/ˈɛpakt/, U.S.

/ˈiˌpæk(t)/,

/ˈɛˌpæk(t)/

Etymology: < French epacte, Latin epacta, Greek ἐπακτή, < ἐπακτός, verbal adjective of ἐπάγειν to intercalate, < ἐπί on + ἄγειν to bring.

a. (Also plural epacts.) The number of days that constitutes the excess of the solar over the lunar year of 12 months.

ΘΚΠ

the world > time > reckoning of time > [noun] > epact(s)

embolismus1398

epact1588

1588 A. King tr. P. Canisius Cathechisme or Schort Instr. N vj b Y^e Epact, quhilk is y^e nombre of y^e dayes quhairby y^e ȝere of y^e sone do exceid y^e ȝere of y^e moone.

1603 C. Heydon Def. Iudiciall Astrol. xviii. 383 The Epact, or 11. daies ouerplus.

1725 R. Bradley Chomel's Dictionaire Œconomique at Year These eleven Days are call'd Epacts.

1752 Philos. Trans. 1749–50 (Royal Soc.) 46 421.

1786 J. Bonnycastle Introd. Astron. 231 The epact, is the difference between the solar year and the lunar one.

b. The number of days in the age of the moon on the first day of the year (now January 1st, but formerly March 1st or 22nd).

ΘΚΠ

the world > time > reckoning of time > [noun] > epact(s) > epact of the moon on first day of year

epact1552

concurrent1561

1552 Bk. Common Prayer (STC 16279) Almanack sig. a.viii^v (heading) The epacte.

1561 R. Eden tr. M. Cortés Arte Nauigation ii. vi. sig. Dvii This nomber of Epact or concurrent is founde.

1594 T. Blundeville Exercises vii. i. f. 307 The Epact [beginneth] the first of March.

1595 J. Davis Seamans Secrets i. sig. A3^v There are 2 numbers especially required, named the Prime and the Epact.

1696 W. Whiston New Theory of Earth ii. 139 The Eccentricity of the Sun is..exactly coincident with the Epact of the Moon.

1704 J. Harris Lexicon Technicum I. (at cited word) Divide by 3; for each one left add Ten; 30 reject; the Prime makes Epact then.

1705 T. Hearne Ductor Historicus (ed. 2) I. i. i. 5 The Epact is the number of Days of the Moon's Age on the last Day of December.

1814 J. Playfair Outl. Nat. Philos. II. i. viii. 137 The Epacts..the ages of the moon..at the beginning of every year.

1867 E. B. Denison Astron. without Math. (ed. 3) 95 The moon's age at that time is called the epact of the year.

2. Any intercalated day or days. rare.

ΘΚΠ

the world > time > reckoning of time > [noun] > adjustments in calculations > leap year > intercalary or extra day in

bissext1398

leap day1600

epact1603

bissextile day1708

1603 P. Holland in tr. Plutarch Morals Gloss. Epact, the day put to, or set in, to make the leape yeere.

1880 Contemp. Rev. Apr. 585 The five days which the Egyptians added by way of epact to the twelve months of thirty days each.

3. attributive.

ΚΠ

1876 Prayer-bk. Interleaved 55 By means of the Epact Almanack, Easter-day for any year may be readily found.

This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2022).

单词	epact
释义	epactn. Brit. /ˈiːpakt/, /ˈɛpakt/, U.S. /ˈiˌpæk(t)/, /ˈɛˌpæk(t)/ Etymology: < French epacte, Latin epacta, Greek ἐπακτή, < ἐπακτός, verbal adjective of ἐπάγειν to intercalate, < ἐπί on + ἄγειν to bring. 1. a. (Also plural epacts.) The number of days that constitutes the excess of the solar over the lunar year of 12 months. ΘΚΠ the world > time > reckoning of time > [noun] > epact(s) embolismus1398 epact1588 1588 A. King tr. P. Canisius Cathechisme or Schort Instr. N vj b Y^e Epact, quhilk is y^e nombre of y^e dayes quhairby y^e ȝere of y^e sone do exceid y^e ȝere of y^e moone. 1603 C. Heydon Def. Iudiciall Astrol. xviii. 383 The Epact, or 11. daies ouerplus. 1725 R. Bradley Chomel's Dictionaire Œconomique at Year These eleven Days are call'd Epacts. 1752 Philos. Trans. 1749–50 (Royal Soc.) 46 421. 1786 J. Bonnycastle Introd. Astron. 231 The epact, is the difference between the solar year and the lunar one. b. The number of days in the age of the moon on the first day of the year (now January 1st, but formerly March 1st or 22nd). ΘΚΠ the world > time > reckoning of time > [noun] > epact(s) > epact of the moon on first day of year epact1552 concurrent1561 1552 Bk. Common Prayer (STC 16279) Almanack sig. a.viii^v (heading) The epacte. 1561 R. Eden tr. M. Cortés Arte Nauigation ii. vi. sig. Dvii This nomber of Epact or concurrent is founde. 1594 T. Blundeville Exercises vii. i. f. 307 The Epact [beginneth] the first of March. 1595 J. Davis Seamans Secrets i. sig. A3^v There are 2 numbers especially required, named the Prime and the Epact. 1696 W. Whiston New Theory of Earth ii. 139 The Eccentricity of the Sun is..exactly coincident with the Epact of the Moon. 1704 J. Harris Lexicon Technicum I. (at cited word) Divide by 3; for each one left add Ten; 30 reject; the Prime makes Epact then. 1705 T. Hearne Ductor Historicus (ed. 2) I. i. i. 5 The Epact is the number of Days of the Moon's Age on the last Day of December. 1814 J. Playfair Outl. Nat. Philos. II. i. viii. 137 The Epacts..the ages of the moon..at the beginning of every year. 1867 E. B. Denison Astron. without Math. (ed. 3) 95 The moon's age at that time is called the epact of the year. 2. Any intercalated day or days. rare. ΘΚΠ the world > time > reckoning of time > [noun] > adjustments in calculations > leap year > intercalary or extra day in bissext1398 leap day1600 epact1603 bissextile day1708 1603 P. Holland in tr. Plutarch Morals Gloss. Epact, the day put to, or set in, to make the leape yeere. 1880 Contemp. Rev. Apr. 585 The five days which the Egyptians added by way of epact to the twelve months of thirty days each. 3. attributive. ΚΠ 1876 Prayer-bk. Interleaved 55 By means of the Epact Almanack, Easter-day for any year may be readily found. This entry has not yet been fully updated (first published 1891; most recently modified version published online June 2022). < n.1552
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