Chapter 20: Numerals in Greek and Latin

# §124. A Table of Greek and Latin Number Words

 LATIN GREEK Cardinal 1, 2, 3 Ordinal 1st, 2nd, 3rd Other1 Cardinal Ordinal Other 1/2 demi-2 semi- hemi- 1 un(i)- prim- singul- hen- prot(o)- mon(o)- 1-1/2 sesqui- 2 duo secund- bi-, bin- dy- deuter(o)- di- 3 tri- terti- ter-, tern- tri- trit(o)- tri- 4 quadr(i)- quadr(u)- quart- quarter(n)- tetr(a)- 5 quinqu(e)- quint- quin- pent(a)- 6 sex- sext- sen- hex(a)- 7 septem- septim- septen- hept(a)- 8 octo- octav- octon- oct(o)-, octa- 9 novem- non- noven- enne(a)- 10 decem- DECI-3 decim- den- dec(a)- 100 cent(i)- centesim- centen- hecaton: HECT(O)-3 1000 mill(i)- millesim- millen- chili(o): KILO-3

NOTES:

1 The “other” Latin numeral forms include adverbs (“twice,” ”thrice,” etc.) and distributives (“one each,” “two each,” etc.). Note these additional sequences:

primarius, secundarius, tertiarius, quartilis, . . . decimalis
singularis, binarius, ternarius, quaternarius, quinarius, . . . centenarius, millenarius
simplex, duplex, triplex, quadruplex, quintuplex (“twofold,” “threefold,” etc., < plicare)

2
The Latin word for “half” was dimidium, which became demi- through French. The regular combining prefix in Latin was semi- (not an independent word). In musical notation, a 64th note is a hemidemisemiquaver—the shorter the note, the longer the word.

3 The forms DECI-, HECT(O)- and KILO- are metric prefixes, adopted from French. In the metric system (SI = Système International), units of measure are divided by Latin prefixes, and multiplied by Greek. See §128.