出典:Wiktionary
出典:『Wiktionary』 (2026/05/17 22:11 UTC 版)
Unknown. Per De Vaan, "no plausible etymology." Pokorny compares Irish braine (“prow, edge”), Old Norse brandr (“acroterium”)), deriving them from *bʰren- (“to project; edge”). De Vaan finds these proposed relationships to be unconvincing due to semantic difficulties. De Vaan suggests a possible derivation from Proto-Indo-European *gʷʰron-t- (“side where the mouth is, front”), perhaps from a root *gʷʰren-, itself perhaps the source of Proto-Indo-European *gʷʰrendʰ-. If this scenario is accepted, the term could be related to Latin frendō. However, De Vaan concedes that this explanation is "speculative."
frōns f or m (genitive frontis); third declension
Third-declension noun (i-stem).
Probably from a Proto-Indo-European *bʰrewd- (“to bud”), and related to Proto-Germanic *breutaną (“to crush, break”).
frōns f (genitive frondis); third declension
Third-declension noun (i-stem).
| singular | plural | |
|---|---|---|
| nominative | frōns | frondēs |
| genitive | frondis | frondium |
| dative | frondī | frondibus |
| accusative | frondem | frondēs frondīs |
| ablative | fronde | frondibus |
| vocative | frōns | frondēs |
出典:Wikipedia
出典:『Wikipedia』 (2010/12/25 22:18 UTC 版)
Frons (singular) is the term used to describe the frontal area of an insect's head. It covers the upper part of the face above the clypeus and below and between the antennae. It supports the pharyngeal dilator muscles and usually bears an ocellus (simple eye). The term itself is derived from the Latin frons "forehead".