off-season
— Noun
– English
～ the season when travel is least active and rates are lowest
order Secotiales
— Noun
– English
～ an order of fungi belonging to the class Gasteromycetes
open secret
— Noun
– English
～ something that is supposed to be secret but is generally known; "their love affair was an open secret"
Ozothamnus secundiflorus
— Noun
– English
～ shrub with white woolly branches and woolly leaves having fragrant flowers forming long sprays; flowers suitable for drying; sometimes placed in genus Helichrysum
OTC security
— Noun
– English
～ a security traded in the over-the-counter market
oil-rich seed
— Noun
– English
～ any of several seeds that yield oil
one-seed
— Adjective
– English
～ having a single seed
one-seeded
— Adjective
– English
～ having a single seed
order Selaginellales
— Noun
– English
～ in some classifications included in Lycopodiales
olfactory sensation
— Noun
– English
～ the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form; "she loved the smell of roses"
Onoclea sensibilis
— Noun
– English
～ beautiful spreading fern of eastern North America and eastern Asia naturalized in western Europe; pinnately divided fronds show a slight tendency to fold when touched; pinnules enclose groups of sori in beadlike lobes
orderly sergeant
— Noun
– English
～ the first sergeant of a company; duties formerly included the conveyance of orders
ordered series
— Noun
– English
～ an ordered reference standard; "judging on a scale of 1 to 10"
Ochna serrulata
— Noun
– English
～ shrub with narrow-elliptic glossy evergreen leaves and yellow flowers with leathery petaloid sepals
open sesame
— Noun
– English
～ a magical command; used by Ali Baba
open sesame
— Noun
– English
～ any very successful means of achieving a result
os sesamoideum
— Noun
– English
～ any of several small round bones formed in a tendon where it passes over a joint
out-of-court settlement
— Noun
– English
～ resolution of a dispute prior to the rendering of a final decision by the trial court
one-seventh
— Noun
– English
～ one part in seven equal parts