Where does “tacnode” come from?

tacnode (English) comes from Latin tāctus, from Latin -tus, from Proto-Italic -tus, from Proto-Indo-European -tus — Derives action nouns from verb roots.

tacnode (English): A point of a curve where two or more osculating...

Definitions

  1. A point of a curve where two or more osculating...

Ancestry of “tacnode”, step by step

StepLanguageWordMeaning
1Latintāctustouched, having been touched, grasped, having been grasped
2Latin-tusForms the past participle of verbs; Forms...
3Proto-Italic-tus—
4Proto-Indo-European-tusDerives action nouns from verb roots
Every word from Proto-Indo-European -tus →Every word from Latin -tus →Every word from Latin tāctus →