-aceae

From the Latin -āceae, the feminine plural of -āceus (“resembling”).

-aceae f pl

1. (taxonomy) Used to form the name of taxonomic families of plants, algae, bacteria, and fungi

• In English, family names ending in -aceae are usually treated as plural (e.g., "Cunoniaceae are" or "the Cunoniaceae family is").
• In English, most family names ending in -aceae follow the pronunciation patterns of /ˈeɪsi, -siˌaɪ, -siˌeɪ, -siˌi/) (e.g., Solanaceae, /ˌsoʊləˈneɪsi/).
• There are only eight exceptions to the rule of using the -aceae termination for taxonomic families under the International Code of Nomenclature for algae, fungi, and plants (Melbourne Code, 2011). Each also has an accepted alternative (nomen alternativum), given in brackets:

• -idae (the equivalent for animals)

• (Classical) IPA^(key): /ˈaː.ke.ae̯/

-āceae

1. nominative feminine plural of -āceus
2. genitive feminine singular of -āceus
3. dative feminine singular of -āceus
4. vocative feminine plural of -āceus

• Translingual: -aceae