u·ni·cos·tate 
(y′nĭ-kŏstāt′)
(y′nĭ-kŏstāt′)adj.
Having a single main costa, rib, or riblike part: a unicostate leaf.
- expected value
- expectorant
- expectorate
- expectoration
- expediate
- expedience
- expediency
- expedient
- expediential
- whodunit
- whodunnit
- whoever
- whole
- whole blood
- whole-cell vaccine
- whole cloth
- whole enchilada
- whole gale
- wholehearted
- wholeheartedly
- wholeheartedness
- whole hog
- whole language
- whole-language
- whole life insurance