Definition of involucre in English:

involucre

noun ˈɪnvəl(j)uːkəˈɪnvəˌlukər

1Anatomy
A membranous envelope.
〔剖〕外皮，包膜
2Botany
A whorl or rosette of bracts surrounding an inflorescence (especially a capitulum) or at the base of an umbel.
〔植〕总苞；蒴包
Example sentencesExamples
- The cupules are simple involucres of bracts which are spirally arranged (according to a Fibonacci pattern) on the floral axis preceding the flower.
- Basal leaves and flowers initiate from a tuberous rhizome and three green cauline leaves arranged in a whorl form an involucre around the developing flower.
- We used to help my grandmother gather the flowers, remove the green involucre from beneath the flowerhead and separate the rays, or florets.
- All flowers are enclosed within an involucre with four marginal glands.
- The Hermaphrodite cyathium shows the characteristics measured (length and width of the cyathium involucre and the nectary).

Origin

Late 16th century: from French, or from Latin involucrum, from involvere 'roll in, envelop' (see involve).

Definition of involucre in US English:

involucre

(also involucrum)

nounˈɪnvəˌlukərˈinvəˌlo͞okər

Botany

A whorl or rosette of bracts surrounding an inflorescence (especially a capitulum) or at the base of an umbel.
〔植〕总苞；蒴包
Example sentencesExamples
- The cupules are simple involucres of bracts which are spirally arranged (according to a Fibonacci pattern) on the floral axis preceding the flower.
- All flowers are enclosed within an involucre with four marginal glands.
- The Hermaphrodite cyathium shows the characteristics measured (length and width of the cyathium involucre and the nectary).
- Basal leaves and flowers initiate from a tuberous rhizome and three green cauline leaves arranged in a whorl form an involucre around the developing flower.
- We used to help my grandmother gather the flowers, remove the green involucre from beneath the flowerhead and separate the rays, or florets.

Origin

Late 16th century: from French, or from Latin involucrum, from involvere ‘roll in, envelop’ (see involve).

词汇	involucre
释义	Definition of involucre in English: involucre noun ˈɪnvəl(j)uːkəˈɪnvəˌlukər 1Anatomy A membranous envelope. 〔剖〕外皮，包膜 2Botany A whorl or rosette of bracts surrounding an inflorescence (especially a capitulum) or at the base of an umbel. 〔植〕总苞；蒴包 Example sentencesExamples The cupules are simple involucres of bracts which are spirally arranged (according to a Fibonacci pattern) on the floral axis preceding the flower. Basal leaves and flowers initiate from a tuberous rhizome and three green cauline leaves arranged in a whorl form an involucre around the developing flower. We used to help my grandmother gather the flowers, remove the green involucre from beneath the flowerhead and separate the rays, or florets. All flowers are enclosed within an involucre with four marginal glands. The Hermaphrodite cyathium shows the characteristics measured (length and width of the cyathium involucre and the nectary). Origin Late 16th century: from French, or from Latin involucrum, from involvere 'roll in, envelop' (see involve). Definition of involucre in US English: involucre (also involucrum) nounˈɪnvəˌlukərˈinvəˌlo͞okər Botany A whorl or rosette of bracts surrounding an inflorescence (especially a capitulum) or at the base of an umbel. 〔植〕总苞；蒴包 Example sentencesExamples The cupules are simple involucres of bracts which are spirally arranged (according to a Fibonacci pattern) on the floral axis preceding the flower. All flowers are enclosed within an involucre with four marginal glands. The Hermaphrodite cyathium shows the characteristics measured (length and width of the cyathium involucre and the nectary). Basal leaves and flowers initiate from a tuberous rhizome and three green cauline leaves arranged in a whorl form an involucre around the developing flower. We used to help my grandmother gather the flowers, remove the green involucre from beneath the flowerhead and separate the rays, or florets. Origin Late 16th century: from French, or from Latin involucrum, from involvere ‘roll in, envelop’ (see involve).
随便看	roll something up/down Rolls-Royce Rolls-Royceless Rolls-Roycey Rolls Series roll sth back roll sth down roll sth out roll sth over roll sth up roll sth up roll stone roll sulfur roll sulphur roll the bones roll the dice roll tobacco roll-top roll-top desk roll-top desks roll tracery roll up roll-up roll up roll up