急尖：叶尖较短而尖锐，如荞麦的叶。
急尖形 acutus
急尖耳平藓 Calyptothecium hookeri
急尖凤尾藓 Fissidens acutus
急尖复叶耳蕨 Arachniodes abrupta
有急尖裂片的 acutilobate
急尖粉花绣线菊 japonica l. f. var. acuta
急性二尖瓣关闭不全 Acute mitral insufficiency
急尖长苞冷杉 Abies smithil
急性尖周炎 Acute apical periodontitis
急性根尖周炎 acute apical periodontitis ; acute periapical periodontitis ; interappointment emergencies
目的：从急尖绣线菊中寻找脑保护活性的有效成分，并初步探讨其保护机制。
Objective: To search for the neuroprotective constituents from Spiraea japonica var. acuta and investigate their mechanisms of neuroprotection .
花5瓣，萼片宽，无柄，基部稍合生，长圆形，急尖，2.5毫米长，花瓣基部稍合生，平展，花瓣白色，花药深红色。
Flowers 5-merous, sepals broadly sessile, slightly connate basally, oblong, acute, to 2.5 mm, petals basally slightly connate, spreading, white, anthers dark red.
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